diff options
author | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-04 22:29:38 +0200 |
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committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-05-04 22:29:38 +0200 |
commit | bd932ae1bd655979d0d765108721951051f0837d (patch) | |
tree | ec8ba10a8f6b02770a81587eb63f0560d19bd782 | |
parent | Merge tag 'boards-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git... (diff) | |
parent | xtensa simdisk: fix braino in "xtensa simdisk: switch to proc_create_data()" (diff) | |
download | linux-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.c | 2 | ||||
-rw-r--r-- | drivers/hwmon/abx500.c | 2 | ||||
-rw-r--r-- | drivers/nubus/proc.c | 15 | ||||
-rw-r--r-- | drivers/scsi/sun3_NCR5380.c | 183 | ||||
-rw-r--r-- | drivers/scsi/sun3_scsi.c | 1 | ||||
-rw-r--r-- | drivers/scsi/sun3_scsi.h | 2 | ||||
-rw-r--r-- | fs/compat.c | 2 | ||||
-rw-r--r-- | fs/compat_ioctl.c | 1 | ||||
-rw-r--r-- | fs/coredump.c | 9 | ||||
-rw-r--r-- | fs/dcache.c | 34 | ||||
-rw-r--r-- | fs/hostfs/hostfs_kern.c | 8 | ||||
-rw-r--r-- | fs/namespace.c | 7 | ||||
-rw-r--r-- | fs/proc/proc_devtree.c | 2 | ||||
-rw-r--r-- | fs/read_write.c | 5 | ||||
-rw-r--r-- | fs/read_write.h | 9 | ||||
-rw-r--r-- | include/linux/fs.h | 7 | ||||
-rw-r--r-- | include/linux/nubus.h | 1 | ||||
-rw-r--r-- | include/uapi/linux/magic.h | 1 | ||||
-rw-r--r-- | kernel/acct.c | 7 |
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); /* |