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authorLinus Torvalds <torvalds@linux-foundation.org>2013-05-04 22:29:38 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2013-05-04 22:29:38 +0200
commitbd932ae1bd655979d0d765108721951051f0837d (patch)
treeec8ba10a8f6b02770a81587eb63f0560d19bd782
parentMerge tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff)
parentxtensa simdisk: fix braino in "xtensa simdisk: switch to proc_create_data()" (diff)
downloadlinux-bd932ae1bd655979d0d765108721951051f0837d.tar.xz
linux-bd932ae1bd655979d0d765108721951051f0837d.zip
Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs
Pull second round of VFS updates from Al Viro: "Assorted fixes" * 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs: xtensa simdisk: fix braino in "xtensa simdisk: switch to proc_create_data()" hostfs: use kmalloc instead of kzalloc hostfs: move HOSTFS_SUPER_MAGIC to <linux/magic.h> hostfs: remove "will unlock" comment vfs: use list_move instead of list_del/list_add proc_devtree: Replace include linux/module.h with linux/export.h create_mnt_ns: unidiomatic use of list_add() fs: remove dentry_lru_prune() Removed unused typedef to avoid "unused local typedef" warnings. kill fs/read_write.h fs: Fix hang with BSD accounting on frozen filesystem sun3_scsi: add ->show_info() nubus: Kill nubus_proc_detach_device() more mode_t whack-a-mole... do_coredump(): don't wait for thaw if coredump has already been interrupted do_mount(): fix a leak introduced in 3.9 ("mount: consolidate permission checks")
-rw-r--r--arch/xtensa/platforms/iss/simdisk.c2
-rw-r--r--drivers/hwmon/abx500.c2
-rw-r--r--drivers/nubus/proc.c15
-rw-r--r--drivers/scsi/sun3_NCR5380.c183
-rw-r--r--drivers/scsi/sun3_scsi.c1
-rw-r--r--drivers/scsi/sun3_scsi.h2
-rw-r--r--fs/compat.c2
-rw-r--r--fs/compat_ioctl.c1
-rw-r--r--fs/coredump.c9
-rw-r--r--fs/dcache.c34
-rw-r--r--fs/hostfs/hostfs_kern.c8
-rw-r--r--fs/namespace.c7
-rw-r--r--fs/proc/proc_devtree.c2
-rw-r--r--fs/read_write.c5
-rw-r--r--fs/read_write.h9
-rw-r--r--include/linux/fs.h7
-rw-r--r--include/linux/nubus.h1
-rw-r--r--include/uapi/linux/magic.h1
-rw-r--r--kernel/acct.c7
19 files changed, 123 insertions, 175 deletions
diff --git a/arch/xtensa/platforms/iss/simdisk.c b/arch/xtensa/platforms/iss/simdisk.c
index 4a06d70ddf5e..88608cc11b8c 100644
--- a/arch/xtensa/platforms/iss/simdisk.c
+++ b/arch/xtensa/platforms/iss/simdisk.c
@@ -231,7 +231,7 @@ static ssize_t proc_read_simdisk(struct file *file, char __user *buf,
}
static ssize_t proc_write_simdisk(struct file *file, const char __user *buf,
- size_t size, loff_t *ppos)
+ size_t count, loff_t *ppos)
{
char *tmp = kmalloc(count + 1, GFP_KERNEL);
struct simdisk *dev = PDE_DATA(file_inode(file));
diff --git a/drivers/hwmon/abx500.c b/drivers/hwmon/abx500.c
index b4ad87b31a37..eee1134274c8 100644
--- a/drivers/hwmon/abx500.c
+++ b/drivers/hwmon/abx500.c
@@ -260,7 +260,7 @@ static ssize_t show_max_alarm(struct device *dev,
return sprintf(buf, "%d\n", data->max_alarm[attr->index]);
}
-static mode_t abx500_attrs_visible(struct kobject *kobj,
+static umode_t abx500_attrs_visible(struct kobject *kobj,
struct attribute *attr, int n)
{
struct device *dev = container_of(kobj, struct device, kobj);
diff --git a/drivers/nubus/proc.c b/drivers/nubus/proc.c
index b8286ed65919..5371b374f1fe 100644
--- a/drivers/nubus/proc.c
+++ b/drivers/nubus/proc.c
@@ -147,21 +147,6 @@ int nubus_proc_attach_device(struct nubus_dev *dev)
}
EXPORT_SYMBOL(nubus_proc_attach_device);
-/* FIXME: this is certainly broken! */
-int nubus_proc_detach_device(struct nubus_dev *dev)
-{
- struct proc_dir_entry *e;
-
- if ((e = dev->procdir)) {
- if (atomic_read(&e->count))
- return -EBUSY;
- remove_proc_entry(e->name, proc_bus_nubus_dir);
- dev->procdir = NULL;
- }
- return 0;
-}
-EXPORT_SYMBOL(nubus_proc_detach_device);
-
/*
* /proc/nubus stuff
*/
diff --git a/drivers/scsi/sun3_NCR5380.c b/drivers/scsi/sun3_NCR5380.c
index 7e12a2e4e0a3..636bbe0ea84c 100644
--- a/drivers/scsi/sun3_NCR5380.c
+++ b/drivers/scsi/sun3_NCR5380.c
@@ -661,121 +661,94 @@ static void __init NCR5380_print_options (struct Scsi_Host *instance)
* Inputs : instance, pointer to this instance.
*/
-static void NCR5380_print_status (struct Scsi_Host *instance)
+static void lprint_Scsi_Cmnd(Scsi_Cmnd *cmd)
{
- char *pr_bfr;
- char *start;
- int len;
-
- NCR_PRINT(NDEBUG_ANY);
- NCR_PRINT_PHASE(NDEBUG_ANY);
-
- pr_bfr = (char *) __get_free_page(GFP_ATOMIC);
- if (!pr_bfr) {
- printk("NCR5380_print_status: no memory for print buffer\n");
- return;
- }
- len = NCR5380_proc_info(instance, pr_bfr, &start, 0, PAGE_SIZE, 0);
- pr_bfr[len] = 0;
- printk("\n%s\n", pr_bfr);
- free_page((unsigned long) pr_bfr);
+ int i, s;
+ unsigned char *command;
+ printk("scsi%d: destination target %d, lun %d\n",
+ H_NO(cmd), cmd->device->id, cmd->device->lun);
+ printk(KERN_CONT " command = ");
+ command = cmd->cmnd;
+ printk(KERN_CONT "%2d (0x%02x)", command[0], command[0]);
+ for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
+ printk(KERN_CONT " %02x", command[i]);
+ printk("\n");
}
-
-/******************************************/
-/*
- * /proc/scsi/[dtc pas16 t128 generic]/[0-ASC_NUM_BOARD_SUPPORTED]
- *
- * *buffer: I/O buffer
- * **start: if inout == FALSE pointer into buffer where user read should start
- * offset: current offset
- * length: length of buffer
- * hostno: Scsi_Host host_no
- * inout: TRUE - user is writing; FALSE - user is reading
- *
- * Return the number of bytes read from or written
-*/
-
-#undef SPRINTF
-#define SPRINTF(fmt,args...) \
- do { if (pos + strlen(fmt) + 20 /* slop */ < buffer + length) \
- pos += sprintf(pos, fmt , ## args); } while(0)
-static
-char *lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, char *pos, char *buffer,
- int length);
-
-static int NCR5380_proc_info(struct Scsi_Host *instance, char *buffer,
- char **start, off_t offset, int length, int inout)
+static void NCR5380_print_status(struct Scsi_Host *instance)
{
- char *pos = buffer;
- struct NCR5380_hostdata *hostdata;
- struct scsi_cmnd *ptr;
- unsigned long flags;
- off_t begin = 0;
-#define check_offset() \
- do { \
- if (pos - buffer < offset - begin) { \
- begin += pos - buffer; \
- pos = buffer; \
- } \
- } while (0)
-
- hostdata = (struct NCR5380_hostdata *)instance->hostdata;
-
- if (inout) { /* Has data been written to the file ? */
- return(-ENOSYS); /* Currently this is a no-op */
- }
- SPRINTF("NCR5380 core release=%d.\n", NCR5380_PUBLIC_RELEASE);
- check_offset();
- local_irq_save(flags);
- SPRINTF("NCR5380: coroutine is%s running.\n", main_running ? "" : "n't");
- check_offset();
- if (!hostdata->connected)
- SPRINTF("scsi%d: no currently connected command\n", HOSTNO);
- else
- pos = lprint_Scsi_Cmnd ((struct scsi_cmnd *) hostdata->connected,
- pos, buffer, length);
- SPRINTF("scsi%d: issue_queue\n", HOSTNO);
- check_offset();
- for (ptr = (struct scsi_cmnd *) hostdata->issue_queue; ptr; ptr = NEXT(ptr))
- {
- pos = lprint_Scsi_Cmnd (ptr, pos, buffer, length);
- check_offset();
- }
-
- SPRINTF("scsi%d: disconnected_queue\n", HOSTNO);
- check_offset();
- for (ptr = (struct scsi_cmnd *) hostdata->disconnected_queue; ptr;
- ptr = NEXT(ptr)) {
- pos = lprint_Scsi_Cmnd (ptr, pos, buffer, length);
- check_offset();
- }
+ struct NCR5380_hostdata *hostdata;
+ Scsi_Cmnd *ptr;
+ unsigned long flags;
+
+ NCR_PRINT(NDEBUG_ANY);
+ NCR_PRINT_PHASE(NDEBUG_ANY);
+
+ hostdata = (struct NCR5380_hostdata *)instance->hostdata;
+
+ printk("\nNCR5380 core release=%d.\n", NCR5380_PUBLIC_RELEASE);
+ local_irq_save(flags);
+ printk("NCR5380: coroutine is%s running.\n",
+ main_running ? "" : "n't");
+ if (!hostdata->connected)
+ printk("scsi%d: no currently connected command\n", HOSTNO);
+ else
+ lprint_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected);
+ printk("scsi%d: issue_queue\n", HOSTNO);
+ for (ptr = (Scsi_Cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr))
+ lprint_Scsi_Cmnd(ptr);
+
+ printk("scsi%d: disconnected_queue\n", HOSTNO);
+ for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr;
+ ptr = NEXT(ptr))
+ lprint_Scsi_Cmnd(ptr);
- local_irq_restore(flags);
- *start = buffer + (offset - begin);
- if (pos - buffer < offset - begin)
- return 0;
- else if (pos - buffer - (offset - begin) < length)
- return pos - buffer - (offset - begin);
- return length;
+ local_irq_restore(flags);
+ printk("\n");
}
-static char *lprint_Scsi_Cmnd(struct scsi_cmnd *cmd, char *pos, char *buffer,
- int length)
+static void show_Scsi_Cmnd(Scsi_Cmnd *cmd, struct seq_file *m)
{
- int i, s;
- unsigned char *command;
- SPRINTF("scsi%d: destination target %d, lun %d\n",
- H_NO(cmd), cmd->device->id, cmd->device->lun);
- SPRINTF(" command = ");
- command = cmd->cmnd;
- SPRINTF("%2d (0x%02x)", command[0], command[0]);
- for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
- SPRINTF(" %02x", command[i]);
- SPRINTF("\n");
- return pos;
+ int i, s;
+ unsigned char *command;
+ seq_printf(m, "scsi%d: destination target %d, lun %d\n",
+ H_NO(cmd), cmd->device->id, cmd->device->lun);
+ seq_printf(m, " command = ");
+ command = cmd->cmnd;
+ seq_printf(m, "%2d (0x%02x)", command[0], command[0]);
+ for (i = 1, s = COMMAND_SIZE(command[0]); i < s; ++i)
+ seq_printf(m, " %02x", command[i]);
+ seq_printf(m, "\n");
}
+static int NCR5380_show_info(struct seq_file *m, struct Scsi_Host *instance)
+{
+ struct NCR5380_hostdata *hostdata;
+ Scsi_Cmnd *ptr;
+ unsigned long flags;
+
+ hostdata = (struct NCR5380_hostdata *)instance->hostdata;
+
+ seq_printf(m, "NCR5380 core release=%d.\n", NCR5380_PUBLIC_RELEASE);
+ local_irq_save(flags);
+ seq_printf(m, "NCR5380: coroutine is%s running.\n",
+ main_running ? "" : "n't");
+ if (!hostdata->connected)
+ seq_printf(m, "scsi%d: no currently connected command\n", HOSTNO);
+ else
+ show_Scsi_Cmnd((Scsi_Cmnd *) hostdata->connected, m);
+ seq_printf(m, "scsi%d: issue_queue\n", HOSTNO);
+ for (ptr = (Scsi_Cmnd *)hostdata->issue_queue; ptr; ptr = NEXT(ptr))
+ show_Scsi_Cmnd(ptr, m);
+
+ seq_printf(m, "scsi%d: disconnected_queue\n", HOSTNO);
+ for (ptr = (Scsi_Cmnd *) hostdata->disconnected_queue; ptr;
+ ptr = NEXT(ptr))
+ show_Scsi_Cmnd(ptr, m);
+
+ local_irq_restore(flags);
+ return 0;
+}
/*
* Function : void NCR5380_init (struct Scsi_Host *instance)
diff --git a/drivers/scsi/sun3_scsi.c b/drivers/scsi/sun3_scsi.c
index 6e25889db9d4..e2c009b033ce 100644
--- a/drivers/scsi/sun3_scsi.c
+++ b/drivers/scsi/sun3_scsi.c
@@ -626,6 +626,7 @@ static int sun3scsi_dma_finish(int write_flag)
#include "sun3_NCR5380.c"
static struct scsi_host_template driver_template = {
+ .show_info = sun3scsi_show_info,
.name = SUN3_SCSI_NAME,
.detect = sun3scsi_detect,
.release = sun3scsi_release,
diff --git a/drivers/scsi/sun3_scsi.h b/drivers/scsi/sun3_scsi.h
index bcefd8458e65..a8da9c710fea 100644
--- a/drivers/scsi/sun3_scsi.h
+++ b/drivers/scsi/sun3_scsi.h
@@ -100,7 +100,7 @@ static int sun3scsi_release (struct Scsi_Host *);
#define NCR5380_queue_command sun3scsi_queue_command
#define NCR5380_bus_reset sun3scsi_bus_reset
#define NCR5380_abort sun3scsi_abort
-#define NCR5380_proc_info sun3scsi_proc_info
+#define NCR5380_show_info sun3scsi_show_info
#define NCR5380_dma_xfer_len(i, cmd, phase) \
sun3scsi_dma_xfer_len(cmd->SCp.this_residual,cmd,((phase) & SR_IO) ? 0 : 1)
diff --git a/fs/compat.c b/fs/compat.c
index d0560c93973d..93f7d021b716 100644
--- a/fs/compat.c
+++ b/fs/compat.c
@@ -67,8 +67,6 @@ int compat_printk(const char *fmt, ...)
return ret;
}
-#include "read_write.h"
-
/*
* Not all architectures have sys_utime, so implement this in terms
* of sys_utimes.
diff --git a/fs/compat_ioctl.c b/fs/compat_ioctl.c
index 3ced75f765ca..996cdc5abb85 100644
--- a/fs/compat_ioctl.c
+++ b/fs/compat_ioctl.c
@@ -608,7 +608,6 @@ struct serial_struct32 {
static int serial_struct_ioctl(unsigned fd, unsigned cmd,
struct serial_struct32 __user *ss32)
{
- typedef struct serial_struct SS;
typedef struct serial_struct32 SS32;
int err;
struct serial_struct ss;
diff --git a/fs/coredump.c b/fs/coredump.c
index a9abe313e8d5..dafafbafa731 100644
--- a/fs/coredump.c
+++ b/fs/coredump.c
@@ -654,10 +654,11 @@ void do_coredump(siginfo_t *siginfo)
goto close_fail;
if (displaced)
put_files_struct(displaced);
- file_start_write(cprm.file);
- core_dumped = !dump_interrupted() && binfmt->core_dump(&cprm);
- file_end_write(cprm.file);
-
+ if (!dump_interrupted()) {
+ file_start_write(cprm.file);
+ core_dumped = binfmt->core_dump(&cprm);
+ file_end_write(cprm.file);
+ }
if (ispipe && core_pipe_limit)
wait_for_dump_helpers(cprm.file);
close_fail:
diff --git a/fs/dcache.c b/fs/dcache.c
index e689268046c3..f09b9085f7d8 100644
--- a/fs/dcache.c
+++ b/fs/dcache.c
@@ -337,23 +337,6 @@ static void dentry_lru_del(struct dentry *dentry)
}
}
-/*
- * Remove a dentry that is unreferenced and about to be pruned
- * (unhashed and destroyed) from the LRU, and inform the file system.
- * This wrapper should be called _prior_ to unhashing a victim dentry.
- */
-static void dentry_lru_prune(struct dentry *dentry)
-{
- if (!list_empty(&dentry->d_lru)) {
- if (dentry->d_flags & DCACHE_OP_PRUNE)
- dentry->d_op->d_prune(dentry);
-
- spin_lock(&dcache_lru_lock);
- __dentry_lru_del(dentry);
- spin_unlock(&dcache_lru_lock);
- }
-}
-
static void dentry_lru_move_list(struct dentry *dentry, struct list_head *list)
{
spin_lock(&dcache_lru_lock);
@@ -486,11 +469,13 @@ relock:
if (ref)
dentry->d_count--;
/*
- * if dentry was on the d_lru list delete it from there.
* inform the fs via d_prune that this dentry is about to be
* unhashed and destroyed.
*/
- dentry_lru_prune(dentry);
+ if (dentry->d_flags & DCACHE_OP_PRUNE)
+ dentry->d_op->d_prune(dentry);
+
+ dentry_lru_del(dentry);
/* if it was on the hash then remove it */
__d_drop(dentry);
return d_kill(dentry, parent);
@@ -919,11 +904,13 @@ static void shrink_dcache_for_umount_subtree(struct dentry *dentry)
struct inode *inode;
/*
- * remove the dentry from the lru, and inform
- * the fs that this dentry is about to be
+ * inform the fs that this dentry is about to be
* unhashed and destroyed.
*/
- dentry_lru_prune(dentry);
+ if (dentry->d_flags & DCACHE_OP_PRUNE)
+ dentry->d_op->d_prune(dentry);
+
+ dentry_lru_del(dentry);
__d_shrink(dentry);
if (dentry->d_count != 0) {
@@ -2410,8 +2397,7 @@ static void __d_materialise_dentry(struct dentry *dentry, struct dentry *anon)
dentry->d_parent = dentry;
list_del_init(&dentry->d_u.d_child);
anon->d_parent = dparent;
- list_del(&anon->d_u.d_child);
- list_add(&anon->d_u.d_child, &dparent->d_subdirs);
+ list_move(&anon->d_u.d_child, &dparent->d_subdirs);
write_seqcount_end(&dentry->d_seq);
write_seqcount_end(&anon->d_seq);
diff --git a/fs/hostfs/hostfs_kern.c b/fs/hostfs/hostfs_kern.c
index 0f6e52d22b84..32f35f187989 100644
--- a/fs/hostfs/hostfs_kern.c
+++ b/fs/hostfs/hostfs_kern.c
@@ -7,6 +7,7 @@
*/
#include <linux/fs.h>
+#include <linux/magic.h>
#include <linux/module.h>
#include <linux/mm.h>
#include <linux/pagemap.h>
@@ -45,8 +46,6 @@ static const struct dentry_operations hostfs_dentry_ops = {
static char *root_ino = "";
static int append = 0;
-#define HOSTFS_SUPER_MAGIC 0x00c0ffee
-
static const struct inode_operations hostfs_iops;
static const struct inode_operations hostfs_dir_iops;
static const struct inode_operations hostfs_link_iops;
@@ -121,7 +120,7 @@ static char *dentry_name(struct dentry *dentry)
if (!name)
return NULL;
- return __dentry_name(dentry, name); /* will unlock */
+ return __dentry_name(dentry, name);
}
static char *inode_name(struct inode *ino)
@@ -229,10 +228,11 @@ static struct inode *hostfs_alloc_inode(struct super_block *sb)
{
struct hostfs_inode_info *hi;
- hi = kzalloc(sizeof(*hi), GFP_KERNEL);
+ hi = kmalloc(sizeof(*hi), GFP_KERNEL);
if (hi == NULL)
return NULL;
hi->fd = -1;
+ hi->mode = 0;
inode_init_once(&hi->vfs_inode);
return &hi->vfs_inode;
}
diff --git a/fs/namespace.c b/fs/namespace.c
index b4f96a5230a3..7b1ca9ba0b0a 100644
--- a/fs/namespace.c
+++ b/fs/namespace.c
@@ -2284,12 +2284,11 @@ long do_mount(const char *dev_name, const char *dir_name,
retval = security_sb_mount(dev_name, &path,
type_page, flags, data_page);
+ if (!retval && !may_mount())
+ retval = -EPERM;
if (retval)
goto dput_out;
- if (!may_mount())
- return -EPERM;
-
/* Default to relatime unless overriden */
if (!(flags & MS_NOATIME))
mnt_flags |= MNT_RELATIME;
@@ -2464,7 +2463,7 @@ static struct mnt_namespace *create_mnt_ns(struct vfsmount *m)
struct mount *mnt = real_mount(m);
mnt->mnt_ns = new_ns;
new_ns->root = mnt;
- list_add(&new_ns->list, &mnt->mnt_list);
+ list_add(&mnt->mnt_list, &new_ns->list);
} else {
mntput(m);
}
diff --git a/fs/proc/proc_devtree.c b/fs/proc/proc_devtree.c
index 505afc950e0a..106a83570630 100644
--- a/fs/proc/proc_devtree.c
+++ b/fs/proc/proc_devtree.c
@@ -12,7 +12,7 @@
#include <linux/stat.h>
#include <linux/string.h>
#include <linux/of.h>
-#include <linux/module.h>
+#include <linux/export.h>
#include <linux/slab.h>
#include <asm/prom.h>
#include <asm/uaccess.h>
diff --git a/fs/read_write.c b/fs/read_write.c
index 605dbbcb1973..90ba3b350e50 100644
--- a/fs/read_write.c
+++ b/fs/read_write.c
@@ -16,12 +16,15 @@
#include <linux/pagemap.h>
#include <linux/splice.h>
#include <linux/compat.h>
-#include "read_write.h"
#include "internal.h"
#include <asm/uaccess.h>
#include <asm/unistd.h>
+typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
+typedef ssize_t (*iov_fn_t)(struct kiocb *, const struct iovec *,
+ unsigned long, loff_t);
+
const struct file_operations generic_ro_fops = {
.llseek = generic_file_llseek,
.read = do_sync_read,
diff --git a/fs/read_write.h b/fs/read_write.h
deleted file mode 100644
index 0ec530d9305b..000000000000
--- a/fs/read_write.h
+++ /dev/null
@@ -1,9 +0,0 @@
-/*
- * This file is only for sharing some helpers from read_write.c with compat.c.
- * Don't use anywhere else.
- */
-
-
-typedef ssize_t (*io_fn_t)(struct file *, char __user *, size_t, loff_t *);
-typedef ssize_t (*iov_fn_t)(struct kiocb *, const struct iovec *,
- unsigned long, loff_t);
diff --git a/include/linux/fs.h b/include/linux/fs.h
index e8cd6b839675..b5a24ba83b6f 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -2227,6 +2227,13 @@ static inline void file_start_write(struct file *file)
__sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, true);
}
+static inline bool file_start_write_trylock(struct file *file)
+{
+ if (!S_ISREG(file_inode(file)->i_mode))
+ return true;
+ return __sb_start_write(file_inode(file)->i_sb, SB_FREEZE_WRITE, false);
+}
+
static inline void file_end_write(struct file *file)
{
if (!S_ISREG(file_inode(file)->i_mode))
diff --git a/include/linux/nubus.h b/include/linux/nubus.h
index b3740527571a..6165b2c62040 100644
--- a/include/linux/nubus.h
+++ b/include/linux/nubus.h
@@ -87,7 +87,6 @@ static inline void nubus_proc_init(void) {}
#endif
int get_nubus_list(char *buf);
int nubus_proc_attach_device(struct nubus_dev *dev);
-int nubus_proc_detach_device(struct nubus_dev *dev);
/* If we need more precision we can add some more of these */
struct nubus_dev* nubus_find_device(unsigned short category,
unsigned short type,
diff --git a/include/uapi/linux/magic.h b/include/uapi/linux/magic.h
index 249df3720be2..2944278a8ba7 100644
--- a/include/uapi/linux/magic.h
+++ b/include/uapi/linux/magic.h
@@ -30,6 +30,7 @@
#define JFFS2_SUPER_MAGIC 0x72b6
#define PSTOREFS_MAGIC 0x6165676C
#define EFIVARFS_MAGIC 0xde5e81e4
+#define HOSTFS_SUPER_MAGIC 0x00c0ffee
#define MINIX_SUPER_MAGIC 0x137F /* minix v1 fs, 14 char names */
#define MINIX_SUPER_MAGIC2 0x138F /* minix v1 fs, 30 char names */
diff --git a/kernel/acct.c b/kernel/acct.c
index 85389fe2abd0..8d6e145138bb 100644
--- a/kernel/acct.c
+++ b/kernel/acct.c
@@ -540,10 +540,15 @@ static void do_acct_process(struct bsd_acct_struct *acct,
ac.ac_swaps = encode_comp_t(0);
/*
+ * Get freeze protection. If the fs is frozen, just skip the write
+ * as we could deadlock the system otherwise.
+ */
+ if (!file_start_write_trylock(file))
+ goto out;
+ /*
* Kernel segment override to datasegment and write it
* to the accounting file.
*/
- file_start_write(file);
fs = get_fs();
set_fs(KERNEL_DS);
/*