diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 07:45:43 +0100 |
---|---|---|
committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-11-13 07:45:43 +0100 |
commit | 5cbb3d216e2041700231bcfc383ee5f8b7fc8b74 (patch) | |
tree | a738fa82dbcefa9bd283c08bc67f38827be63937 /kernel | |
parent | Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vir... (diff) | |
parent | ipc, msg: fix message length check for negative values (diff) | |
download | linux-5cbb3d216e2041700231bcfc383ee5f8b7fc8b74.tar.xz linux-5cbb3d216e2041700231bcfc383ee5f8b7fc8b74.zip |
Merge branch 'akpm' (patches from Andrew Morton)
Merge first patch-bomb from Andrew Morton:
"Quite a lot of other stuff is banked up awaiting further
next->mainline merging, but this batch contains:
- Lots of random misc patches
- OCFS2
- Most of MM
- backlight updates
- lib/ updates
- printk updates
- checkpatch updates
- epoll tweaking
- rtc updates
- hfs
- hfsplus
- documentation
- procfs
- update gcov to gcc-4.7 format
- IPC"
* emailed patches from Andrew Morton <akpm@linux-foundation.org>: (269 commits)
ipc, msg: fix message length check for negative values
ipc/util.c: remove unnecessary work pending test
devpts: plug the memory leak in kill_sb
./Makefile: export initial ramdisk compression config option
init/Kconfig: add option to disable kernel compression
drivers: w1: make w1_slave::flags long to avoid memory corruption
drivers/w1/masters/ds1wm.cuse dev_get_platdata()
drivers/memstick/core/ms_block.c: fix unreachable state in h_msb_read_page()
drivers/memstick/core/mspro_block.c: fix attributes array allocation
drivers/pps/clients/pps-gpio.c: remove redundant of_match_ptr
kernel/panic.c: reduce 1 byte usage for print tainted buffer
gcov: reuse kbasename helper
kernel/gcov/fs.c: use pr_warn()
kernel/module.c: use pr_foo()
gcov: compile specific gcov implementation based on gcc version
gcov: add support for gcc 4.7 gcov format
gcov: move gcov structs definitions to a gcc version specific file
kernel/taskstats.c: return -ENOMEM when alloc memory fails in add_del_listener()
kernel/taskstats.c: add nla_nest_cancel() for failure processing between nla_nest_start() and nla_nest_end()
kernel/sysctl_binary.c: use scnprintf() instead of snprintf()
...
Diffstat (limited to 'kernel')
-rw-r--r-- | kernel/cpu.c | 29 | ||||
-rw-r--r-- | kernel/delayacct.c | 7 | ||||
-rw-r--r-- | kernel/events/core.c | 3 | ||||
-rw-r--r-- | kernel/gcov/Kconfig | 30 | ||||
-rw-r--r-- | kernel/gcov/Makefile | 32 | ||||
-rw-r--r-- | kernel/gcov/base.c | 32 | ||||
-rw-r--r-- | kernel/gcov/fs.c | 52 | ||||
-rw-r--r-- | kernel/gcov/gcc_3_4.c | 115 | ||||
-rw-r--r-- | kernel/gcov/gcc_4_7.c | 560 | ||||
-rw-r--r-- | kernel/gcov/gcov.h | 65 | ||||
-rw-r--r-- | kernel/kprobes.c | 4 | ||||
-rw-r--r-- | kernel/kthread.c | 73 | ||||
-rw-r--r-- | kernel/module.c | 103 | ||||
-rw-r--r-- | kernel/panic.c | 2 | ||||
-rw-r--r-- | kernel/printk/printk.c | 35 | ||||
-rw-r--r-- | kernel/ptrace.c | 3 | ||||
-rw-r--r-- | kernel/sys.c | 1 | ||||
-rw-r--r-- | kernel/sysctl.c | 5 | ||||
-rw-r--r-- | kernel/sysctl_binary.c | 6 | ||||
-rw-r--r-- | kernel/taskstats.c | 16 |
20 files changed, 934 insertions, 239 deletions
diff --git a/kernel/cpu.c b/kernel/cpu.c index 63aa50d7ce1e..973d034acf84 100644 --- a/kernel/cpu.c +++ b/kernel/cpu.c @@ -437,11 +437,6 @@ int cpu_up(unsigned int cpu) { int err = 0; -#ifdef CONFIG_MEMORY_HOTPLUG - int nid; - pg_data_t *pgdat; -#endif - if (!cpu_possible(cpu)) { printk(KERN_ERR "can't online cpu %d because it is not " "configured as may-hotadd at boot time\n", cpu); @@ -452,27 +447,9 @@ int cpu_up(unsigned int cpu) return -EINVAL; } -#ifdef CONFIG_MEMORY_HOTPLUG - nid = cpu_to_node(cpu); - if (!node_online(nid)) { - err = mem_online_node(nid); - if (err) - return err; - } - - pgdat = NODE_DATA(nid); - if (!pgdat) { - printk(KERN_ERR - "Can't online cpu %d due to NULL pgdat\n", cpu); - return -ENOMEM; - } - - if (pgdat->node_zonelists->_zonerefs->zone == NULL) { - mutex_lock(&zonelists_mutex); - build_all_zonelists(NULL, NULL); - mutex_unlock(&zonelists_mutex); - } -#endif + err = try_online_node(cpu_to_node(cpu)); + if (err) + return err; cpu_maps_update_begin(); diff --git a/kernel/delayacct.c b/kernel/delayacct.c index d473988c1d0b..54996b71e66d 100644 --- a/kernel/delayacct.c +++ b/kernel/delayacct.c @@ -108,12 +108,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk) struct timespec ts; cputime_t utime, stime, stimescaled, utimescaled; - /* Though tsk->delays accessed later, early exit avoids - * unnecessary returning of other data - */ - if (!tsk->delays) - goto done; - tmp = (s64)d->cpu_run_real_total; task_cputime(tsk, &utime, &stime); cputime_to_timespec(utime + stime, &ts); @@ -158,7 +152,6 @@ int __delayacct_add_tsk(struct taskstats *d, struct task_struct *tsk) d->freepages_count += tsk->delays->freepages_count; spin_unlock_irqrestore(&tsk->delays->lock, flags); -done: return 0; } diff --git a/kernel/events/core.c b/kernel/events/core.c index 8c875ef6e120..d724e7757cd1 100644 --- a/kernel/events/core.c +++ b/kernel/events/core.c @@ -2234,9 +2234,6 @@ static void __perf_event_sync_stat(struct perf_event *event, perf_event_update_userpage(next_event); } -#define list_next_entry(pos, member) \ - list_entry(pos->member.next, typeof(*pos), member) - static void perf_event_sync_stat(struct perf_event_context *ctx, struct perf_event_context *next_ctx) { diff --git a/kernel/gcov/Kconfig b/kernel/gcov/Kconfig index d4da55d1fb65..d04ce8ac4399 100644 --- a/kernel/gcov/Kconfig +++ b/kernel/gcov/Kconfig @@ -46,4 +46,34 @@ config GCOV_PROFILE_ALL larger and run slower. Also be sure to exclude files from profiling which are not linked to the kernel image to prevent linker errors. +choice + prompt "Specify GCOV format" + depends on GCOV_KERNEL + default GCOV_FORMAT_AUTODETECT + ---help--- + The gcov format is usually determined by the GCC version, but there are + exceptions where format changes are integrated in lower-version GCCs. + In such a case use this option to adjust the format used in the kernel + accordingly. + + If unsure, choose "Autodetect". + +config GCOV_FORMAT_AUTODETECT + bool "Autodetect" + ---help--- + Select this option to use the format that corresponds to your GCC + version. + +config GCOV_FORMAT_3_4 + bool "GCC 3.4 format" + ---help--- + Select this option to use the format defined by GCC 3.4. + +config GCOV_FORMAT_4_7 + bool "GCC 4.7 format" + ---help--- + Select this option to use the format defined by GCC 4.7. + +endchoice + endmenu diff --git a/kernel/gcov/Makefile b/kernel/gcov/Makefile index e97ca59e2520..52aa7e8de927 100644 --- a/kernel/gcov/Makefile +++ b/kernel/gcov/Makefile @@ -1,3 +1,33 @@ ccflags-y := -DSRCTREE='"$(srctree)"' -DOBJTREE='"$(objtree)"' -obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o gcc_3_4.o +# if-lt +# Usage VAR := $(call if-lt, $(a), $(b)) +# Returns 1 if (a < b) +if-lt = $(shell [ $(1) -lt $(2) ] && echo 1) + +ifeq ($(CONFIG_GCOV_FORMAT_3_4),y) + cc-ver := 0304 +else ifeq ($(CONFIG_GCOV_FORMAT_4_7),y) + cc-ver := 0407 +else +# Use cc-version if available, otherwise set 0 +# +# scripts/Kbuild.include, which contains cc-version function, is not included +# during make clean "make -f scripts/Makefile.clean obj=kernel/gcov" +# Meaning cc-ver is empty causing if-lt test to fail with +# "/bin/sh: line 0: [: -lt: unary operator expected" error mesage. +# This has no affect on the clean phase, but the error message could be +# confusing/annoying. So this dummy workaround sets cc-ver to zero if cc-version +# is not available. We can probably move if-lt to Kbuild.include, so it's also +# not defined during clean or to include Kbuild.include in +# scripts/Makefile.clean. But the following workaround seems least invasive. + cc-ver := $(if $(call cc-version),$(call cc-version),0) +endif + +obj-$(CONFIG_GCOV_KERNEL) := base.o fs.o + +ifeq ($(call if-lt, $(cc-ver), 0407),1) + obj-$(CONFIG_GCOV_KERNEL) += gcc_3_4.o +else + obj-$(CONFIG_GCOV_KERNEL) += gcc_4_7.o +endif diff --git a/kernel/gcov/base.c b/kernel/gcov/base.c index 9b22d03cc581..f45b75b713c0 100644 --- a/kernel/gcov/base.c +++ b/kernel/gcov/base.c @@ -20,7 +20,6 @@ #include <linux/mutex.h> #include "gcov.h" -static struct gcov_info *gcov_info_head; static int gcov_events_enabled; static DEFINE_MUTEX(gcov_lock); @@ -34,7 +33,7 @@ void __gcov_init(struct gcov_info *info) mutex_lock(&gcov_lock); if (gcov_version == 0) { - gcov_version = info->version; + gcov_version = gcov_info_version(info); /* * Printing gcc's version magic may prove useful for debugging * incompatibility reports. @@ -45,8 +44,7 @@ void __gcov_init(struct gcov_info *info) * Add new profiling data structure to list and inform event * listener. */ - info->next = gcov_info_head; - gcov_info_head = info; + gcov_info_link(info); if (gcov_events_enabled) gcov_event(GCOV_ADD, info); mutex_unlock(&gcov_lock); @@ -81,6 +79,12 @@ void __gcov_merge_delta(gcov_type *counters, unsigned int n_counters) } EXPORT_SYMBOL(__gcov_merge_delta); +void __gcov_merge_ior(gcov_type *counters, unsigned int n_counters) +{ + /* Unused. */ +} +EXPORT_SYMBOL(__gcov_merge_ior); + /** * gcov_enable_events - enable event reporting through gcov_event() * @@ -91,13 +95,15 @@ EXPORT_SYMBOL(__gcov_merge_delta); */ void gcov_enable_events(void) { - struct gcov_info *info; + struct gcov_info *info = NULL; mutex_lock(&gcov_lock); gcov_events_enabled = 1; + /* Perform event callback for previously registered entries. */ - for (info = gcov_info_head; info; info = info->next) + while ((info = gcov_info_next(info))) gcov_event(GCOV_ADD, info); + mutex_unlock(&gcov_lock); } @@ -112,25 +118,23 @@ static int gcov_module_notifier(struct notifier_block *nb, unsigned long event, void *data) { struct module *mod = data; - struct gcov_info *info; - struct gcov_info *prev; + struct gcov_info *info = NULL; + struct gcov_info *prev = NULL; if (event != MODULE_STATE_GOING) return NOTIFY_OK; mutex_lock(&gcov_lock); - prev = NULL; + /* Remove entries located in module from linked list. */ - for (info = gcov_info_head; info; info = info->next) { + while ((info = gcov_info_next(info))) { if (within(info, mod->module_core, mod->core_size)) { - if (prev) - prev->next = info->next; - else - gcov_info_head = info->next; + gcov_info_unlink(prev, info); if (gcov_events_enabled) gcov_event(GCOV_REMOVE, info); } else prev = info; } + mutex_unlock(&gcov_lock); return NOTIFY_OK; diff --git a/kernel/gcov/fs.c b/kernel/gcov/fs.c index 7a7d2ee96d42..15ff01a76379 100644 --- a/kernel/gcov/fs.c +++ b/kernel/gcov/fs.c @@ -75,7 +75,7 @@ static int __init gcov_persist_setup(char *str) unsigned long val; if (kstrtoul(str, 0, &val)) { - pr_warning("invalid gcov_persist parameter '%s'\n", str); + pr_warn("invalid gcov_persist parameter '%s'\n", str); return 0; } gcov_persist = val; @@ -242,7 +242,7 @@ static struct gcov_node *get_node_by_name(const char *name) list_for_each_entry(node, &all_head, all) { info = get_node_info(node); - if (info && (strcmp(info->filename, name) == 0)) + if (info && (strcmp(gcov_info_filename(info), name) == 0)) return node; } @@ -279,7 +279,7 @@ static ssize_t gcov_seq_write(struct file *file, const char __user *addr, seq = file->private_data; info = gcov_iter_get_info(seq->private); mutex_lock(&node_lock); - node = get_node_by_name(info->filename); + node = get_node_by_name(gcov_info_filename(info)); if (node) { /* Reset counts or remove node for unloaded modules. */ if (node->num_loaded == 0) @@ -365,7 +365,7 @@ static const char *deskew(const char *basename) */ static void add_links(struct gcov_node *node, struct dentry *parent) { - char *basename; + const char *basename; char *target; int num; int i; @@ -376,14 +376,14 @@ static void add_links(struct gcov_node *node, struct dentry *parent) if (!node->links) return; for (i = 0; i < num; i++) { - target = get_link_target(get_node_info(node)->filename, - &gcov_link[i]); + target = get_link_target( + gcov_info_filename(get_node_info(node)), + &gcov_link[i]); if (!target) goto out_err; - basename = strrchr(target, '/'); - if (!basename) + basename = kbasename(target); + if (basename == target) goto out_err; - basename++; node->links[i] = debugfs_create_symlink(deskew(basename), parent, target); if (!node->links[i]) @@ -450,7 +450,7 @@ static struct gcov_node *new_node(struct gcov_node *parent, } else node->dentry = debugfs_create_dir(node->name, parent->dentry); if (!node->dentry) { - pr_warning("could not create file\n"); + pr_warn("could not create file\n"); kfree(node); return NULL; } @@ -463,7 +463,7 @@ static struct gcov_node *new_node(struct gcov_node *parent, err_nomem: kfree(node); - pr_warning("out of memory\n"); + pr_warn("out of memory\n"); return NULL; } @@ -576,7 +576,7 @@ static void add_node(struct gcov_info *info) struct gcov_node *parent; struct gcov_node *node; - filename = kstrdup(info->filename, GFP_KERNEL); + filename = kstrdup(gcov_info_filename(info), GFP_KERNEL); if (!filename) return; parent = &root_node; @@ -630,8 +630,8 @@ static void add_info(struct gcov_node *node, struct gcov_info *info) */ loaded_info = kcalloc(num + 1, sizeof(struct gcov_info *), GFP_KERNEL); if (!loaded_info) { - pr_warning("could not add '%s' (out of memory)\n", - info->filename); + pr_warn("could not add '%s' (out of memory)\n", + gcov_info_filename(info)); return; } memcpy(loaded_info, node->loaded_info, @@ -644,8 +644,9 @@ static void add_info(struct gcov_node *node, struct gcov_info *info) * data set replaces the copy of the last one. */ if (!gcov_info_is_compatible(node->unloaded_info, info)) { - pr_warning("discarding saved data for %s " - "(incompatible version)\n", info->filename); + pr_warn("discarding saved data for %s " + "(incompatible version)\n", + gcov_info_filename(info)); gcov_info_free(node->unloaded_info); node->unloaded_info = NULL; } @@ -655,8 +656,8 @@ static void add_info(struct gcov_node *node, struct gcov_info *info) * The initial one takes precedence. */ if (!gcov_info_is_compatible(node->loaded_info[0], info)) { - pr_warning("could not add '%s' (incompatible " - "version)\n", info->filename); + pr_warn("could not add '%s' (incompatible " + "version)\n", gcov_info_filename(info)); kfree(loaded_info); return; } @@ -691,8 +692,9 @@ static void save_info(struct gcov_node *node, struct gcov_info *info) else { node->unloaded_info = gcov_info_dup(info); if (!node->unloaded_info) { - pr_warning("could not save data for '%s' " - "(out of memory)\n", info->filename); + pr_warn("could not save data for '%s' " + "(out of memory)\n", + gcov_info_filename(info)); } } } @@ -707,8 +709,8 @@ static void remove_info(struct gcov_node *node, struct gcov_info *info) i = get_info_index(node, info); if (i < 0) { - pr_warning("could not remove '%s' (not found)\n", - info->filename); + pr_warn("could not remove '%s' (not found)\n", + gcov_info_filename(info)); return; } if (gcov_persist) @@ -735,7 +737,7 @@ void gcov_event(enum gcov_action action, struct gcov_info *info) struct gcov_node *node; mutex_lock(&node_lock); - node = get_node_by_name(info->filename); + node = get_node_by_name(gcov_info_filename(info)); switch (action) { case GCOV_ADD: if (node) @@ -747,8 +749,8 @@ void gcov_event(enum gcov_action action, struct gcov_info *info) if (node) remove_info(node, info); else { - pr_warning("could not remove '%s' (not found)\n", - info->filename); + pr_warn("could not remove '%s' (not found)\n", + gcov_info_filename(info)); } break; } diff --git a/kernel/gcov/gcc_3_4.c b/kernel/gcov/gcc_3_4.c index ae5bb4260033..27bc88a35013 100644 --- a/kernel/gcov/gcc_3_4.c +++ b/kernel/gcov/gcc_3_4.c @@ -21,6 +21,121 @@ #include <linux/vmalloc.h> #include "gcov.h" +#define GCOV_COUNTERS 5 + +static struct gcov_info *gcov_info_head; + +/** + * struct gcov_fn_info - profiling meta data per function + * @ident: object file-unique function identifier + * @checksum: function checksum + * @n_ctrs: number of values per counter type belonging to this function + * + * This data is generated by gcc during compilation and doesn't change + * at run-time. + */ +struct gcov_fn_info { + unsigned int ident; + unsigned int checksum; + unsigned int n_ctrs[0]; +}; + +/** + * struct gcov_ctr_info - profiling data per counter type + * @num: number of counter values for this type + * @values: array of counter values for this type + * @merge: merge function for counter values of this type (unused) + * + * This data is generated by gcc during compilation and doesn't change + * at run-time with the exception of the values array. + */ +struct gcov_ctr_info { + unsigned int num; + gcov_type *values; + void (*merge)(gcov_type *, unsigned int); +}; + +/** + * struct gcov_info - profiling data per object file + * @version: gcov version magic indicating the gcc version used for compilation + * @next: list head for a singly-linked list + * @stamp: time stamp + * @filename: name of the associated gcov data file + * @n_functions: number of instrumented functions + * @functions: function data + * @ctr_mask: mask specifying which counter types are active + * @counts: counter data per counter type + * + * This data is generated by gcc during compilation and doesn't change + * at run-time with the exception of the next pointer. + */ +struct gcov_info { + unsigned int version; + struct gcov_info *next; + unsigned int stamp; + const char *filename; + unsigned int n_functions; + const struct gcov_fn_info *functions; + unsigned int ctr_mask; + struct gcov_ctr_info counts[0]; +}; + +/** + * gcov_info_filename - return info filename + * @info: profiling data set + */ +const char *gcov_info_filename(struct gcov_info *info) +{ + return info->filename; +} + +/** + * gcov_info_version - return info version + * @info: profiling data set + */ +unsigned int gcov_info_version(struct gcov_info *info) +{ + return info->version; +} + +/** + * gcov_info_next - return next profiling data set + * @info: profiling data set + * + * Returns next gcov_info following @info or first gcov_info in the chain if + * @info is %NULL. + */ +struct gcov_info *gcov_info_next(struct gcov_info *info) +{ + if (!info) + return gcov_info_head; + + return info->next; +} + +/** + * gcov_info_link - link/add profiling data set to the list + * @info: profiling data set + */ +void gcov_info_link(struct gcov_info *info) +{ + info->next = gcov_info_head; + gcov_info_head = info; +} + +/** + * gcov_info_unlink - unlink/remove profiling data set from the list + * @prev: previous profiling data set + * @info: profiling data set + */ +void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info) +{ + if (prev) + prev->next = info->next; + else + gcov_info_head = info->next; +} + /* Symbolic links to be created for each profiling data file. */ const struct gcov_link gcov_link[] = { { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */ diff --git a/kernel/gcov/gcc_4_7.c b/kernel/gcov/gcc_4_7.c new file mode 100644 index 000000000000..2c6e4631c814 --- /dev/null +++ b/kernel/gcov/gcc_4_7.c @@ -0,0 +1,560 @@ +/* + * This code provides functions to handle gcc's profiling data format + * introduced with gcc 4.7. + * + * This file is based heavily on gcc_3_4.c file. + * + * For a better understanding, refer to gcc source: + * gcc/gcov-io.h + * libgcc/libgcov.c + * + * Uses gcc-internal data definitions. + */ + +#include <linux/errno.h> +#include <linux/slab.h> +#include <linux/string.h> +#include <linux/seq_file.h> +#include <linux/vmalloc.h> +#include "gcov.h" + +#define GCOV_COUNTERS 8 +#define GCOV_TAG_FUNCTION_LENGTH 3 + +static struct gcov_info *gcov_info_head; + +/** + * struct gcov_ctr_info - information about counters for a single function + * @num: number of counter values for this type + * @values: array of counter values for this type + * + * This data is generated by gcc during compilation and doesn't change + * at run-time with the exception of the values array. + */ +struct gcov_ctr_info { + unsigned int num; + gcov_type *values; +}; + +/** + * struct gcov_fn_info - profiling meta data per function + * @key: comdat key + * @ident: unique ident of function + * @lineno_checksum: function lineo_checksum + * @cfg_checksum: function cfg checksum + * @ctrs: instrumented counters + * + * This data is generated by gcc during compilation and doesn't change + * at run-time. + * + * Information about a single function. This uses the trailing array + * idiom. The number of counters is determined from the merge pointer + * array in gcov_info. The key is used to detect which of a set of + * comdat functions was selected -- it points to the gcov_info object + * of the object file containing the selected comdat function. + */ +struct gcov_fn_info { + const struct gcov_info *key; + unsigned int ident; + unsigned int lineno_checksum; + unsigned int cfg_checksum; + struct gcov_ctr_info ctrs[0]; +}; + +/** + * struct gcov_info - profiling data per object file + * @version: gcov version magic indicating the gcc version used for compilation + * @next: list head for a singly-linked list + * @stamp: uniquifying time stamp + * @filename: name of the associated gcov data file + * @merge: merge functions (null for unused counter type) + * @n_functions: number of instrumented functions + * @functions: pointer to pointers to function information + * + * This data is generated by gcc during compilation and doesn't change + * at run-time with the exception of the next pointer. + */ +struct gcov_info { + unsigned int version; + struct gcov_info *next; + unsigned int stamp; + const char *filename; + void (*merge[GCOV_COUNTERS])(gcov_type *, unsigned int); + unsigned int n_functions; + struct gcov_fn_info **functions; +}; + +/** + * gcov_info_filename - return info filename + * @info: profiling data set + */ +const char *gcov_info_filename(struct gcov_info *info) +{ + return info->filename; +} + +/** + * gcov_info_version - return info version + * @info: profiling data set + */ +unsigned int gcov_info_version(struct gcov_info *info) +{ + return info->version; +} + +/** + * gcov_info_next - return next profiling data set + * @info: profiling data set + * + * Returns next gcov_info following @info or first gcov_info in the chain if + * @info is %NULL. + */ +struct gcov_info *gcov_info_next(struct gcov_info *info) +{ + if (!info) + return gcov_info_head; + + return info->next; +} + +/** + * gcov_info_link - link/add profiling data set to the list + * @info: profiling data set + */ +void gcov_info_link(struct gcov_info *info) +{ + info->next = gcov_info_head; + gcov_info_head = info; +} + +/** + * gcov_info_unlink - unlink/remove profiling data set from the list + * @prev: previous profiling data set + * @info: profiling data set + */ +void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info) +{ + if (prev) + prev->next = info->next; + else + gcov_info_head = info->next; +} + +/* Symbolic links to be created for each profiling data file. */ +const struct gcov_link gcov_link[] = { + { OBJ_TREE, "gcno" }, /* Link to .gcno file in $(objtree). */ + { 0, NULL}, +}; + +/* + * Determine whether a counter is active. Doesn't change at run-time. + */ +static int counter_active(struct gcov_info *info, unsigned int type) +{ + return info->merge[type] ? 1 : 0; +} + +/* Determine number of active counters. Based on gcc magic. */ +static unsigned int num_counter_active(struct gcov_info *info) +{ + unsigned int i; + unsigned int result = 0; + + for (i = 0; i < GCOV_COUNTERS; i++) { + if (counter_active(info, i)) + result++; + } + return result; +} + +/** + * gcov_info_reset - reset profiling data to zero + * @info: profiling data set + */ +void gcov_info_reset(struct gcov_info *info) +{ + struct gcov_ctr_info *ci_ptr; + unsigned int fi_idx; + unsigned int ct_idx; + + for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) { + ci_ptr = info->functions[fi_idx]->ctrs; + + for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) { + if (!counter_active(info, ct_idx)) + continue; + + memset(ci_ptr->values, 0, + sizeof(gcov_type) * ci_ptr->num); + ci_ptr++; + } + } +} + +/** + * gcov_info_is_compatible - check if profiling data can be added + * @info1: first profiling data set + * @info2: second profiling data set + * + * Returns non-zero if profiling data can be added, zero otherwise. + */ +int gcov_info_is_compatible(struct gcov_info *info1, struct gcov_info *info2) +{ + return (info1->stamp == info2->stamp); +} + +/** + * gcov_info_add - add up profiling data + * @dest: profiling data set to which data is added + * @source: profiling data set which is added + * + * Adds profiling counts of @source to @dest. + */ +void gcov_info_add(struct gcov_info *dst, struct gcov_info *src) +{ + struct gcov_ctr_info *dci_ptr; + struct gcov_ctr_info *sci_ptr; + unsigned int fi_idx; + unsigned int ct_idx; + unsigned int val_idx; + + for (fi_idx = 0; fi_idx < src->n_functions; fi_idx++) { + dci_ptr = dst->functions[fi_idx]->ctrs; + sci_ptr = src->functions[fi_idx]->ctrs; + + for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) { + if (!counter_active(src, ct_idx)) + continue; + + for (val_idx = 0; val_idx < sci_ptr->num; val_idx++) + dci_ptr->values[val_idx] += + sci_ptr->values[val_idx]; + + dci_ptr++; + sci_ptr++; + } + } +} + +/** + * gcov_info_dup - duplicate profiling data set + * @info: profiling data set to duplicate + * + * Return newly allocated duplicate on success, %NULL on error. + */ +struct gcov_info *gcov_info_dup(struct gcov_info *info) +{ + struct gcov_info *dup; + struct gcov_ctr_info *dci_ptr; /* dst counter info */ + struct gcov_ctr_info *sci_ptr; /* src counter info */ + unsigned int active; + unsigned int fi_idx; /* function info idx */ + unsigned int ct_idx; /* counter type idx */ + size_t fi_size; /* function info size */ + size_t cv_size; /* counter values size */ + + dup = kmemdup(info, sizeof(*dup), GFP_KERNEL); + if (!dup) + return NULL; + + dup->next = NULL; + dup->filename = NULL; + dup->functions = NULL; + + dup->filename = kstrdup(info->filename, GFP_KERNEL); + if (!dup->filename) + goto err_free; + + dup->functions = kcalloc(info->n_functions, + sizeof(struct gcov_fn_info *), GFP_KERNEL); + if (!dup->functions) + goto err_free; + + active = num_counter_active(info); + fi_size = sizeof(struct gcov_fn_info); + fi_size += sizeof(struct gcov_ctr_info) * active; + + for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) { + dup->functions[fi_idx] = kzalloc(fi_size, GFP_KERNEL); + if (!dup->functions[fi_idx]) + goto err_free; + + *(dup->functions[fi_idx]) = *(info->functions[fi_idx]); + + sci_ptr = info->functions[fi_idx]->ctrs; + dci_ptr = dup->functions[fi_idx]->ctrs; + + for (ct_idx = 0; ct_idx < active; ct_idx++) { + + cv_size = sizeof(gcov_type) * sci_ptr->num; + + dci_ptr->values = vmalloc(cv_size); + + if (!dci_ptr->values) + goto err_free; + + dci_ptr->num = sci_ptr->num; + memcpy(dci_ptr->values, sci_ptr->values, cv_size); + + sci_ptr++; + dci_ptr++; + } + } + + return dup; +err_free: + gcov_info_free(dup); + return NULL; +} + +/** + * gcov_info_free - release memory for profiling data set duplicate + * @info: profiling data set duplicate to free + */ +void gcov_info_free(struct gcov_info *info) +{ + unsigned int active; + unsigned int fi_idx; + unsigned int ct_idx; + struct gcov_ctr_info *ci_ptr; + + if (!info->functions) + goto free_info; + + active = num_counter_active(info); + + for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) { + if (!info->functions[fi_idx]) + continue; + + ci_ptr = info->functions[fi_idx]->ctrs; + + for (ct_idx = 0; ct_idx < active; ct_idx++, ci_ptr++) + vfree(ci_ptr->values); + + kfree(info->functions[fi_idx]); + } + +free_info: + kfree(info->functions); + kfree(info->filename); + kfree(info); +} + +#define ITER_STRIDE PAGE_SIZE + +/** + * struct gcov_iterator - specifies current file position in logical records + * @info: associated profiling data + * @buffer: buffer containing file data + * @size: size of buffer + * @pos: current position in file + */ +struct gcov_iterator { + struct gcov_info *info; + void *buffer; + size_t size; + loff_t pos; +}; + +/** + * store_gcov_u32 - store 32 bit number in gcov format to buffer + * @buffer: target buffer or NULL + * @off: offset into the buffer + * @v: value to be stored + * + * Number format defined by gcc: numbers are recorded in the 32 bit + * unsigned binary form of the endianness of the machine generating the + * file. Returns the number of bytes stored. If @buffer is %NULL, doesn't + * store anything. + */ +static size_t store_gcov_u32(void *buffer, size_t off, u32 v) +{ + u32 *data; + + if (buffer) { + data = buffer + off; + *data = v; + } + + return sizeof(*data); +} + +/** + * store_gcov_u64 - store 64 bit number in gcov format to buffer + * @buffer: target buffer or NULL + * @off: offset into the buffer + * @v: value to be stored + * + * Number format defined by gcc: numbers are recorded in the 32 bit + * unsigned binary form of the endianness of the machine generating the + * file. 64 bit numbers are stored as two 32 bit numbers, the low part + * first. Returns the number of bytes stored. If @buffer is %NULL, doesn't store + * anything. + */ +static size_t store_gcov_u64(void *buffer, size_t off, u64 v) +{ + u32 *data; + + if (buffer) { + data = buffer + off; + + data[0] = (v & 0xffffffffUL); + data[1] = (v >> 32); + } + + return sizeof(*data) * 2; +} + +/** + * convert_to_gcda - convert profiling data set to gcda file format + * @buffer: the buffer to store file data or %NULL if no data should be stored + * @info: profiling data set to be converted + * + * Returns the number of bytes that were/would have been stored into the buffer. + */ +static size_t convert_to_gcda(char *buffer, struct gcov_info *info) +{ + struct gcov_fn_info *fi_ptr; + struct gcov_ctr_info *ci_ptr; + unsigned int fi_idx; + unsigned int ct_idx; + unsigned int cv_idx; + size_t pos = 0; + + /* File header. */ + pos += store_gcov_u32(buffer, pos, GCOV_DATA_MAGIC); + pos += store_gcov_u32(buffer, pos, info->version); + pos += store_gcov_u32(buffer, pos, info->stamp); + + for (fi_idx = 0; fi_idx < info->n_functions; fi_idx++) { + fi_ptr = info->functions[fi_idx]; + + /* Function record. */ + pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION); + pos += store_gcov_u32(buffer, pos, GCOV_TAG_FUNCTION_LENGTH); + pos += store_gcov_u32(buffer, pos, fi_ptr->ident); + pos += store_gcov_u32(buffer, pos, fi_ptr->lineno_checksum); + pos += store_gcov_u32(buffer, pos, fi_ptr->cfg_checksum); + + ci_ptr = fi_ptr->ctrs; + + for (ct_idx = 0; ct_idx < GCOV_COUNTERS; ct_idx++) { + if (!counter_active(info, ct_idx)) + continue; + + /* Counter record. */ + pos += store_gcov_u32(buffer, pos, + GCOV_TAG_FOR_COUNTER(ct_idx)); + pos += store_gcov_u32(buffer, pos, ci_ptr->num * 2); + + for (cv_idx = 0; cv_idx < ci_ptr->num; cv_idx++) { + pos += store_gcov_u64(buffer, pos, + ci_ptr->values[cv_idx]); + } + + ci_ptr++; + } + } + + return pos; +} + +/** + * gcov_iter_new - allocate and initialize profiling data iterator + * @info: profiling data set to be iterated + * + * Return file iterator on success, %NULL otherwise. + */ +struct gcov_iterator *gcov_iter_new(struct gcov_info *info) +{ + struct gcov_iterator *iter; + + iter = kzalloc(sizeof(struct gcov_iterator), GFP_KERNEL); + if (!iter) + goto err_free; + + iter->info = info; + /* Dry-run to get the actual buffer size. */ + iter->size = convert_to_gcda(NULL, info); + iter->buffer = vmalloc(iter->size); + if (!iter->buffer) + goto err_free; + + convert_to_gcda(iter->buffer, info); + + return iter; + +err_free: + kfree(iter); + return NULL; +} + + +/** + * gcov_iter_get_info - return profiling data set for given file iterator + * @iter: file iterator + */ +void gcov_iter_free(struct gcov_iterator *iter) +{ + vfree(iter->buffer); + kfree(iter); +} + +/** + * gcov_iter_get_info - return profiling data set for given file iterator + * @iter: file iterator + */ +struct gcov_info *gcov_iter_get_info(struct gcov_iterator *iter) +{ + return iter->info; +} + +/** + * gcov_iter_start - reset file iterator to starting position + * @iter: file iterator + */ +void gcov_iter_start(struct gcov_iterator *iter) +{ + iter->pos = 0; +} + +/** + * gcov_iter_next - advance file iterator to next logical record + * @iter: file iterator + * + * Return zero if new position is valid, non-zero if iterator has reached end. + */ +int gcov_iter_next(struct gcov_iterator *iter) +{ + if (iter->pos < iter->size) + iter->pos += ITER_STRIDE; + + if (iter->pos >= iter->size) + return -EINVAL; + + return 0; +} + +/** + * gcov_iter_write - write data for current pos to seq_file + * @iter: file iterator + * @seq: seq_file handle + * + * Return zero on success, non-zero otherwise. + */ +int gcov_iter_write(struct gcov_iterator *iter, struct seq_file *seq) +{ + size_t len; + + if (iter->pos >= iter->size) + return -EINVAL; + + len = ITER_STRIDE; + if (iter->pos + len > iter->size) + len = iter->size - iter->pos; + + seq_write(seq, iter->buffer + iter->pos, len); + + return 0; +} diff --git a/kernel/gcov/gcov.h b/kernel/gcov/gcov.h index 060073ebf7a6..92c8e22a29ed 100644 --- a/kernel/gcov/gcov.h +++ b/kernel/gcov/gcov.h @@ -21,7 +21,6 @@ * gcc and need to be kept as close to the original definition as possible to * remain compatible. */ -#define GCOV_COUNTERS 5 #define GCOV_DATA_MAGIC ((unsigned int) 0x67636461) #define GCOV_TAG_FUNCTION ((unsigned int) 0x01000000) #define GCOV_TAG_COUNTER_BASE ((unsigned int) 0x01a10000) @@ -34,60 +33,18 @@ typedef long gcov_type; typedef long long gcov_type; #endif -/** - * struct gcov_fn_info - profiling meta data per function - * @ident: object file-unique function identifier - * @checksum: function checksum - * @n_ctrs: number of values per counter type belonging to this function - * - * This data is generated by gcc during compilation and doesn't change - * at run-time. - */ -struct gcov_fn_info { - unsigned int ident; - unsigned int checksum; - unsigned int n_ctrs[0]; -}; - -/** - * struct gcov_ctr_info - profiling data per counter type - * @num: number of counter values for this type - * @values: array of counter values for this type - * @merge: merge function for counter values of this type (unused) - * - * This data is generated by gcc during compilation and doesn't change - * at run-time with the exception of the values array. - */ -struct gcov_ctr_info { - unsigned int num; - gcov_type *values; - void (*merge)(gcov_type *, unsigned int); -}; +/* Opaque gcov_info. The gcov structures can change as for example in gcc 4.7 so + * we cannot use full definition here and they need to be placed in gcc specific + * implementation of gcov. This also means no direct access to the members in + * generic code and usage of the interface below.*/ +struct gcov_info; -/** - * struct gcov_info - profiling data per object file - * @version: gcov version magic indicating the gcc version used for compilation - * @next: list head for a singly-linked list - * @stamp: time stamp - * @filename: name of the associated gcov data file - * @n_functions: number of instrumented functions - * @functions: function data - * @ctr_mask: mask specifying which counter types are active - * @counts: counter data per counter type - * - * This data is generated by gcc during compilation and doesn't change - * at run-time with the exception of the next pointer. - */ -struct gcov_info { - unsigned int version; - struct gcov_info *next; - unsigned int stamp; - const char *filename; - unsigned int n_functions; - const struct gcov_fn_info *functions; - unsigned int ctr_mask; - struct gcov_ctr_info counts[0]; -}; +/* Interface to access gcov_info data */ +const char *gcov_info_filename(struct gcov_info *info); +unsigned int gcov_info_version(struct gcov_info *info); +struct gcov_info *gcov_info_next(struct gcov_info *info); +void gcov_info_link(struct gcov_info *info); +void gcov_info_unlink(struct gcov_info *prev, struct gcov_info *info); /* Base interface. */ enum gcov_action { diff --git a/kernel/kprobes.c b/kernel/kprobes.c index a0d367a49122..ceeadfcabb76 100644 --- a/kernel/kprobes.c +++ b/kernel/kprobes.c @@ -2066,7 +2066,7 @@ static int __init init_kprobes(void) { int i, err = 0; unsigned long offset = 0, size = 0; - char *modname, namebuf[128]; + char *modname, namebuf[KSYM_NAME_LEN]; const char *symbol_name; void *addr; struct kprobe_blackpoint *kb; @@ -2192,7 +2192,7 @@ static int __kprobes show_kprobe_addr(struct seq_file *pi, void *v) const char *sym = NULL; unsigned int i = *(loff_t *) v; unsigned long offset = 0; - char *modname, namebuf[128]; + char *modname, namebuf[KSYM_NAME_LEN]; head = &kprobe_table[i]; preempt_disable(); diff --git a/kernel/kthread.c b/kernel/kthread.c index 760e86df8c20..b5ae3ee860a9 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -33,7 +33,7 @@ struct kthread_create_info /* Result passed back to kthread_create() from kthreadd. */ struct task_struct *result; - struct completion done; + struct completion *done; struct list_head list; }; @@ -178,6 +178,7 @@ static int kthread(void *_create) struct kthread_create_info *create = _create; int (*threadfn)(void *data) = create->threadfn; void *data = create->data; + struct completion *done; struct kthread self; int ret; @@ -187,10 +188,16 @@ static int kthread(void *_create) init_completion(&self.parked); current->vfork_done = &self.exited; + /* If user was SIGKILLed, I release the structure. */ + done = xchg(&create->done, NULL); + if (!done) { + kfree(create); + do_exit(-EINTR); + } /* OK, tell user we're spawned, wait for stop or wakeup */ __set_current_state(TASK_UNINTERRUPTIBLE); create->result = current; - complete(&create->done); + complete(done); schedule(); ret = -EINTR; @@ -223,8 +230,15 @@ static void create_kthread(struct kthread_create_info *create) /* We want our own signal handler (we take no signals by default). */ pid = kernel_thread(kthread, create, CLONE_FS | CLONE_FILES | SIGCHLD); if (pid < 0) { + /* If user was SIGKILLed, I release the structure. */ + struct completion *done = xchg(&create->done, NULL); + + if (!done) { + kfree(create); + return; + } create->result = ERR_PTR(pid); - complete(&create->done); + complete(done); } } @@ -255,36 +269,59 @@ struct task_struct *kthread_create_on_node(int (*threadfn)(void *data), const char namefmt[], ...) { - struct kthread_create_info create; - - create.threadfn = threadfn; - create.data = data; - create.node = node; - init_completion(&create.done); + DECLARE_COMPLETION_ONSTACK(done); + struct task_struct *task; + struct kthread_create_info *create = kmalloc(sizeof(*create), + GFP_KERNEL); + + if (!create) + return ERR_PTR(-ENOMEM); + create->threadfn = threadfn; + create->data = data; + create->node = node; + create->done = &done; spin_lock(&kthread_create_lock); - list_add_tail(&create.list, &kthread_create_list); + list_add_tail(&create->list, &kthread_create_list); spin_unlock(&kthread_create_lock); wake_up_process(kthreadd_task); - wait_for_completion(&create.done); - - if (!IS_ERR(create.result)) { + /* + * Wait for completion in killable state, for I might be chosen by + * the OOM killer while kthreadd is trying to allocate memory for + * new kernel thread. + */ + if (unlikely(wait_for_completion_killable(&done))) { + /* + * If I was SIGKILLed before kthreadd (or new kernel thread) + * calls complete(), leave the cleanup of this structure to + * that thread. + */ + if (xchg(&create->done, NULL)) + return ERR_PTR(-ENOMEM); + /* + * kthreadd (or new kernel thread) will call complete() + * shortly. + */ + wait_for_completion(&done); + } + task = create->result; + if (!IS_ERR(task)) { static const struct sched_param param = { .sched_priority = 0 }; va_list args; va_start(args, namefmt); - vsnprintf(create.result->comm, sizeof(create.result->comm), - namefmt, args); + vsnprintf(task->comm, sizeof(task->comm), namefmt, args); va_end(args); /* * root may have changed our (kthreadd's) priority or CPU mask. * The kernel thread should not inherit these properties. */ - sched_setscheduler_nocheck(create.result, SCHED_NORMAL, ¶m); - set_cpus_allowed_ptr(create.result, cpu_all_mask); + sched_setscheduler_nocheck(task, SCHED_NORMAL, ¶m); + set_cpus_allowed_ptr(task, cpu_all_mask); } - return create.result; + kfree(create); + return task; } EXPORT_SYMBOL(kthread_create_on_node); diff --git a/kernel/module.c b/kernel/module.c index dc582749fa13..af5ebd21d77b 100644 --- a/kernel/module.c +++ b/kernel/module.c @@ -378,23 +378,21 @@ static bool check_symbol(const struct symsearch *syms, if (syms->licence == GPL_ONLY) return false; if (syms->licence == WILL_BE_GPL_ONLY && fsa->warn) { - printk(KERN_WARNING "Symbol %s is being used " - "by a non-GPL module, which will not " - "be allowed in the future\n", fsa->name); + pr_warn("Symbol %s is being used by a non-GPL module, " + "which will not be allowed in the future\n", + fsa->name); } } #ifdef CONFIG_UNUSED_SYMBOLS if (syms->unused && fsa->warn) { - printk(KERN_WARNING "Symbol %s is marked as UNUSED, " - "however this module is using it.\n", fsa->name); - printk(KERN_WARNING - "This symbol will go away in the future.\n"); - printk(KERN_WARNING - "Please evalute if this is the right api to use and if " - "it really is, submit a report the linux kernel " - "mailinglist together with submitting your code for " - "inclusion.\n"); + pr_warn("Symbol %s is marked as UNUSED, however this module is " + "using it.\n", fsa->name); + pr_warn("This symbol will go away in the future.\n"); + pr_warn("Please evalute if this is the right api to use and if " + "it really is, submit a report the linux kernel " + "mailinglist together with submitting your code for " + "inclusion.\n"); } #endif @@ -492,16 +490,15 @@ static int percpu_modalloc(struct module *mod, struct load_info *info) return 0; if (align > PAGE_SIZE) { - printk(KERN_WARNING "%s: per-cpu alignment %li > %li\n", - mod->name, align, PAGE_SIZE); + pr_warn("%s: per-cpu alignment %li > %li\n", + mod->name, align, PAGE_SIZE); align = PAGE_SIZE; } mod->percpu = __alloc_reserved_percpu(pcpusec->sh_size, align); if (!mod->percpu) { - printk(KERN_WARNING - "%s: Could not allocate %lu bytes percpu data\n", - mod->name, (unsigned long)pcpusec->sh_size); + pr_warn("%s: Could not allocate %lu bytes percpu data\n", + mod->name, (unsigned long)pcpusec->sh_size); return -ENOMEM; } mod->percpu_size = pcpusec->sh_size; @@ -679,7 +676,7 @@ static int add_module_usage(struct module *a, struct module *b) pr_debug("Allocating new usage for %s.\n", a->name); use = kmalloc(sizeof(*use), GFP_ATOMIC); if (!use) { - printk(KERN_WARNING "%s: out of memory loading\n", a->name); + pr_warn("%s: out of memory loading\n", a->name); return -ENOMEM; } @@ -1145,8 +1142,7 @@ static int try_to_force_load(struct module *mod, const char *reason) { #ifdef CONFIG_MODULE_FORCE_LOAD if (!test_taint(TAINT_FORCED_MODULE)) - printk(KERN_WARNING "%s: %s: kernel tainted.\n", - mod->name, reason); + pr_warn("%s: %s: kernel tainted.\n", mod->name, reason); add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_NOW_UNRELIABLE); return 0; #else @@ -1199,8 +1195,7 @@ static int check_version(Elf_Shdr *sechdrs, goto bad_version; } - printk(KERN_WARNING "%s: no symbol version for %s\n", - mod->name, symname); + pr_warn("%s: no symbol version for %s\n", mod->name, symname); return 0; bad_version: @@ -1309,8 +1304,8 @@ resolve_symbol_wait(struct module *mod, !IS_ERR(ksym = resolve_symbol(mod, info, name, owner)) || PTR_ERR(ksym) != -EBUSY, 30 * HZ) <= 0) { - printk(KERN_WARNING "%s: gave up waiting for init of module %s.\n", - mod->name, owner); + pr_warn("%s: gave up waiting for init of module %s.\n", + mod->name, owner); } return ksym; } @@ -1626,15 +1621,14 @@ static int mod_sysfs_init(struct module *mod) struct kobject *kobj; if (!module_sysfs_initialized) { - printk(KERN_ERR "%s: module sysfs not initialized\n", - mod->name); + pr_err("%s: module sysfs not initialized\n", mod->name); err = -EINVAL; goto out; } kobj = kset_find_obj(module_kset, mod->name); if (kobj) { - printk(KERN_ERR "%s: module is already loaded\n", mod->name); + pr_err("%s: module is already loaded\n", mod->name); kobject_put(kobj); err = -EINVAL; goto out; @@ -1961,8 +1955,7 @@ static int verify_export_symbols(struct module *mod) for (i = 0; i < ARRAY_SIZE(arr); i++) { for (s = arr[i].sym; s < arr[i].sym + arr[i].num; s++) { if (find_symbol(s->name, &owner, NULL, true, false)) { - printk(KERN_ERR - "%s: exports duplicate symbol %s" + pr_err("%s: exports duplicate symbol %s" " (owned by %s)\n", mod->name, s->name, module_name(owner)); return -ENOEXEC; @@ -2013,8 +2006,8 @@ static int simplify_symbols(struct module *mod, const struct load_info *info) if (!ksym && ELF_ST_BIND(sym[i].st_info) == STB_WEAK) break; - printk(KERN_WARNING "%s: Unknown symbol %s (err %li)\n", - mod->name, name, PTR_ERR(ksym)); + pr_warn("%s: Unknown symbol %s (err %li)\n", + mod->name, name, PTR_ERR(ksym)); ret = PTR_ERR(ksym) ?: -ENOENT; break; @@ -2168,8 +2161,8 @@ static void set_license(struct module *mod, const char *license) if (!license_is_gpl_compatible(license)) { if (!test_taint(TAINT_PROPRIETARY_MODULE)) - printk(KERN_WARNING "%s: module license '%s' taints " - "kernel.\n", mod->name, license); + pr_warn("%s: module license '%s' taints kernel.\n", + mod->name, license); add_taint_module(mod, TAINT_PROPRIETARY_MODULE, LOCKDEP_NOW_UNRELIABLE); } @@ -2405,8 +2398,8 @@ static void dynamic_debug_setup(struct _ddebug *debug, unsigned int num) return; #ifdef CONFIG_DYNAMIC_DEBUG if (ddebug_add_module(debug, num, debug->modname)) - printk(KERN_ERR "dynamic debug error adding module: %s\n", - debug->modname); + pr_err("dynamic debug error adding module: %s\n", + debug->modname); #endif } @@ -2619,8 +2612,7 @@ static int rewrite_section_headers(struct load_info *info, int flags) Elf_Shdr *shdr = &info->sechdrs[i]; if (shdr->sh_type != SHT_NOBITS && info->len < shdr->sh_offset + shdr->sh_size) { - printk(KERN_ERR "Module len %lu truncated\n", - info->len); + pr_err("Module len %lu truncated\n", info->len); return -ENOEXEC; } @@ -2682,15 +2674,14 @@ static struct module *setup_load_info(struct load_info *info, int flags) info->index.mod = find_sec(info, ".gnu.linkonce.this_module"); if (!info->index.mod) { - printk(KERN_WARNING "No module found in object\n"); + pr_warn("No module found in object\n"); return ERR_PTR(-ENOEXEC); } /* This is temporary: point mod into copy of data. */ mod = (void *)info->sechdrs[info->index.mod].sh_addr; if (info->index.sym == 0) { - printk(KERN_WARNING "%s: module has no symbols (stripped?)\n", - mod->name); + pr_warn("%s: module has no symbols (stripped?)\n", mod->name); return ERR_PTR(-ENOEXEC); } @@ -2717,7 +2708,7 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags) if (err) return err; } else if (!same_magic(modmagic, vermagic, info->index.vers)) { - printk(KERN_ERR "%s: version magic '%s' should be '%s'\n", + pr_err("%s: version magic '%s' should be '%s'\n", mod->name, modmagic, vermagic); return -ENOEXEC; } @@ -2727,9 +2718,8 @@ static int check_modinfo(struct module *mod, struct load_info *info, int flags) if (get_modinfo(info, "staging")) { add_taint_module(mod, TAINT_CRAP, LOCKDEP_STILL_OK); - printk(KERN_WARNING "%s: module is from the staging directory," - " the quality is unknown, you have been warned.\n", - mod->name); + pr_warn("%s: module is from the staging directory, the quality " + "is unknown, you have been warned.\n", mod->name); } /* Set up license info based on the info section */ @@ -2801,8 +2791,7 @@ static void find_module_sections(struct module *mod, struct load_info *info) sizeof(*mod->extable), &mod->num_exentries); if (section_addr(info, "__obsparm")) - printk(KERN_WARNING "%s: Ignoring obsolete parameters\n", - mod->name); + pr_warn("%s: Ignoring obsolete parameters\n", mod->name); info->debug = section_objs(info, "__verbose", sizeof(*info->debug), &info->num_debug); @@ -3078,11 +3067,10 @@ static int do_init_module(struct module *mod) return ret; } if (ret > 0) { - printk(KERN_WARNING -"%s: '%s'->init suspiciously returned %d, it should follow 0/-E convention\n" -"%s: loading module anyway...\n", - __func__, mod->name, ret, - __func__); + pr_warn("%s: '%s'->init suspiciously returned %d, it should " + "follow 0/-E convention\n" + "%s: loading module anyway...\n", + __func__, mod->name, ret, __func__); dump_stack(); } @@ -3205,10 +3193,8 @@ static int unknown_module_param_cb(char *param, char *val, const char *modname) { /* Check for magic 'dyndbg' arg */ int ret = ddebug_dyndbg_module_param_cb(param, val, modname); - if (ret != 0) { - printk(KERN_WARNING "%s: unknown parameter '%s' ignored\n", - modname, param); - } + if (ret != 0) + pr_warn("%s: unknown parameter '%s' ignored\n", modname, param); return 0; } @@ -3243,10 +3229,9 @@ static int load_module(struct load_info *info, const char __user *uargs, #ifdef CONFIG_MODULE_SIG mod->sig_ok = info->sig_ok; if (!mod->sig_ok) { - printk_once(KERN_NOTICE - "%s: module verification failed: signature and/or" - " required key missing - tainting kernel\n", - mod->name); + pr_notice_once("%s: module verification failed: signature " + "and/or required key missing - tainting " + "kernel\n", mod->name); add_taint_module(mod, TAINT_FORCED_MODULE, LOCKDEP_STILL_OK); } #endif diff --git a/kernel/panic.c b/kernel/panic.c index b6c482ccc5db..c00b4ceb39e8 100644 --- a/kernel/panic.c +++ b/kernel/panic.c @@ -233,7 +233,7 @@ static const struct tnt tnts[] = { */ const char *print_tainted(void) { - static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ") + 1]; + static char buf[ARRAY_SIZE(tnts) + sizeof("Tainted: ")]; if (tainted_mask) { char *s; diff --git a/kernel/printk/printk.c b/kernel/printk/printk.c index b4e8500afdb3..be7c86bae576 100644 --- a/kernel/printk/printk.c +++ b/kernel/printk/printk.c @@ -705,9 +705,9 @@ const struct file_operations kmsg_fops = { #ifdef CONFIG_KEXEC /* - * This appends the listed symbols to /proc/vmcoreinfo + * This appends the listed symbols to /proc/vmcore * - * /proc/vmcoreinfo is used by various utiilties, like crash and makedumpfile to + * /proc/vmcore is used by various utilities, like crash and makedumpfile to * obtain access to symbols that are otherwise very difficult to locate. These * symbols are specifically used so that utilities can access and extract the * dmesg log from a vmcore file after a crash. @@ -791,7 +791,7 @@ static bool __read_mostly ignore_loglevel; static int __init ignore_loglevel_setup(char *str) { ignore_loglevel = 1; - printk(KERN_INFO "debug: ignoring loglevel setting.\n"); + pr_info("debug: ignoring loglevel setting.\n"); return 0; } @@ -820,9 +820,9 @@ static int __init boot_delay_setup(char *str) pr_debug("boot_delay: %u, preset_lpj: %ld, lpj: %lu, " "HZ: %d, loops_per_msec: %llu\n", boot_delay, preset_lpj, lpj, HZ, loops_per_msec); - return 1; + return 0; } -__setup("boot_delay=", boot_delay_setup); +early_param("boot_delay", boot_delay_setup); static void boot_delay_msec(int level) { @@ -2193,7 +2193,7 @@ static int __read_mostly keep_bootcon; static int __init keep_bootcon_setup(char *str) { keep_bootcon = 1; - printk(KERN_INFO "debug: skip boot console de-registration.\n"); + pr_info("debug: skip boot console de-registration.\n"); return 0; } @@ -2241,7 +2241,7 @@ void register_console(struct console *newcon) /* find the last or real console */ for_each_console(bcon) { if (!(bcon->flags & CON_BOOT)) { - printk(KERN_INFO "Too late to register bootconsole %s%d\n", + pr_info("Too late to register bootconsole %s%d\n", newcon->name, newcon->index); return; } @@ -2358,21 +2358,18 @@ void register_console(struct console *newcon) * users know there might be something in the kernel's log buffer that * went to the bootconsole (that they do not see on the real console) */ + pr_info("%sconsole [%s%d] enabled\n", + (newcon->flags & CON_BOOT) ? "boot" : "" , + newcon->name, newcon->index); if (bcon && ((newcon->flags & (CON_CONSDEV | CON_BOOT)) == CON_CONSDEV) && !keep_bootcon) { - /* we need to iterate through twice, to make sure we print - * everything out, before we unregister the console(s) + /* We need to iterate through all boot consoles, to make + * sure we print everything out, before we unregister them. */ - printk(KERN_INFO "console [%s%d] enabled, bootconsole disabled\n", - newcon->name, newcon->index); for_each_console(bcon) if (bcon->flags & CON_BOOT) unregister_console(bcon); - } else { - printk(KERN_INFO "%sconsole [%s%d] enabled\n", - (newcon->flags & CON_BOOT) ? "boot" : "" , - newcon->name, newcon->index); } } EXPORT_SYMBOL(register_console); @@ -2382,6 +2379,10 @@ int unregister_console(struct console *console) struct console *a, *b; int res; + pr_info("%sconsole [%s%d] disabled\n", + (console->flags & CON_BOOT) ? "boot" : "" , + console->name, console->index); + res = _braille_unregister_console(console); if (res) return res; @@ -2421,8 +2422,6 @@ static int __init printk_late_init(void) for_each_console(con) { if (!keep_bootcon && con->flags & CON_BOOT) { - printk(KERN_INFO "turn off boot console %s%d\n", - con->name, con->index); unregister_console(con); } } @@ -2449,7 +2448,7 @@ static void wake_up_klogd_work_func(struct irq_work *irq_work) if (pending & PRINTK_PENDING_SCHED) { char *buf = __get_cpu_var(printk_sched_buf); - printk(KERN_WARNING "[sched_delayed] %s", buf); + pr_warn("[sched_delayed] %s", buf); } if (pending & PRINTK_PENDING_WAKEUP) diff --git a/kernel/ptrace.c b/kernel/ptrace.c index dd562e9aa2c8..1f4bcb3cc21c 100644 --- a/kernel/ptrace.c +++ b/kernel/ptrace.c @@ -257,7 +257,8 @@ ok: if (task->mm) dumpable = get_dumpable(task->mm); rcu_read_lock(); - if (!dumpable && !ptrace_has_cap(__task_cred(task)->user_ns, mode)) { + if (dumpable != SUID_DUMP_USER && + !ptrace_has_cap(__task_cred(task)->user_ns, mode)) { rcu_read_unlock(); return -EPERM; } diff --git a/kernel/sys.c b/kernel/sys.c index c18ecca575b4..c72311324ea7 100644 --- a/kernel/sys.c +++ b/kernel/sys.c @@ -16,7 +16,6 @@ #include <linux/perf_event.h> #include <linux/resource.h> #include <linux/kernel.h> -#include <linux/kexec.h> #include <linux/workqueue.h> #include <linux/capability.h> #include <linux/device.h> diff --git a/kernel/sysctl.c b/kernel/sysctl.c index 36547dddcdb8..d37d9dd8f463 100644 --- a/kernel/sysctl.c +++ b/kernel/sysctl.c @@ -2222,8 +2222,11 @@ static int __do_proc_doulongvec_minmax(void *data, struct ctl_table *table, int *i = val; } else { val = convdiv * (*i) / convmul; - if (!first) + if (!first) { err = proc_put_char(&buffer, &left, '\t'); + if (err) + break; + } err = proc_put_long(&buffer, &left, val, false); if (err) break; diff --git a/kernel/sysctl_binary.c b/kernel/sysctl_binary.c index b609213ca9a2..653cbbd9e7ad 100644 --- a/kernel/sysctl_binary.c +++ b/kernel/sysctl_binary.c @@ -1024,7 +1024,7 @@ static ssize_t bin_intvec(struct file *file, if (get_user(value, vec + i)) goto out_kfree; - str += snprintf(str, end - str, "%lu\t", value); + str += scnprintf(str, end - str, "%lu\t", value); } result = kernel_write(file, buffer, str - buffer, 0); @@ -1095,7 +1095,7 @@ static ssize_t bin_ulongvec(struct file *file, if (get_user(value, vec + i)) goto out_kfree; - str += snprintf(str, end - str, "%lu\t", value); + str += scnprintf(str, end - str, "%lu\t", value); } result = kernel_write(file, buffer, str - buffer, 0); @@ -1205,7 +1205,7 @@ static ssize_t bin_dn_node_address(struct file *file, if (get_user(dnaddr, (__le16 __user *)newval)) goto out; - len = snprintf(buf, sizeof(buf), "%hu.%hu", + len = scnprintf(buf, sizeof(buf), "%hu.%hu", le16_to_cpu(dnaddr) >> 10, le16_to_cpu(dnaddr) & 0x3ff); diff --git a/kernel/taskstats.c b/kernel/taskstats.c index 145bb4d3bd4d..9f4618eb51c8 100644 --- a/kernel/taskstats.c +++ b/kernel/taskstats.c @@ -290,6 +290,7 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd) struct listener_list *listeners; struct listener *s, *tmp, *s2; unsigned int cpu; + int ret = 0; if (!cpumask_subset(mask, cpu_possible_mask)) return -EINVAL; @@ -304,9 +305,10 @@ static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd) for_each_cpu(cpu, mask) { s = kmalloc_node(sizeof(struct listener), GFP_KERNEL, cpu_to_node(cpu)); - if (!s) + if (!s) { + ret = -ENOMEM; goto cleanup; - + } s->pid = pid; s->valid = 1; @@ -339,7 +341,7 @@ cleanup: } up_write(&listeners->sem); } - return 0; + return ret; } static int parse(struct nlattr *na, struct cpumask *mask) @@ -404,11 +406,15 @@ static struct taskstats *mk_reply(struct sk_buff *skb, int type, u32 pid) if (!na) goto err; - if (nla_put(skb, type, sizeof(pid), &pid) < 0) + if (nla_put(skb, type, sizeof(pid), &pid) < 0) { + nla_nest_cancel(skb, na); goto err; + } ret = nla_reserve(skb, TASKSTATS_TYPE_STATS, sizeof(struct taskstats)); - if (!ret) + if (!ret) { + nla_nest_cancel(skb, na); goto err; + } nla_nest_end(skb, na); return nla_data(ret); |