diff options
| -rw-r--r-- | drivers/char/raw.c | 1 | ||||
| -rw-r--r-- | fs/fcntl.c | 10 | ||||
| -rw-r--r-- | include/linux/fs.h | 2 |
3 files changed, 9 insertions, 4 deletions
diff --git a/drivers/char/raw.c b/drivers/char/raw.c index 96adf28..20d90e6 100644 --- a/drivers/char/raw.c +++ b/drivers/char/raw.c @@ -90,6 +90,7 @@ out1: blkdev_put(bdev, filp->f_mode); out: mutex_unlock(&raw_mutex); + unlock_kernel(); return err; } @@ -531,6 +531,12 @@ int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fap if (!new) return -ENOMEM; } + + /* + * We need to take f_lock first since it's not an IRQ-safe + * lock. + */ + spin_lock(&filp->f_lock); write_lock_irq(&fasync_lock); for (fp = fapp; (fa = *fp) != NULL; fp = &fa->fa_next) { if (fa->fa_file == filp) { @@ -555,14 +561,12 @@ int fasync_helper(int fd, struct file * filp, int on, struct fasync_struct **fap result = 1; } out: - /* Fix up FASYNC bit while still holding fasync_lock */ - spin_lock(&filp->f_lock); if (on) filp->f_flags |= FASYNC; else filp->f_flags &= ~FASYNC; - spin_unlock(&filp->f_lock); write_unlock_irq(&fasync_lock); + spin_unlock(&filp->f_lock); return result; } diff --git a/include/linux/fs.h b/include/linux/fs.h index 42436ae..87e7bfc 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -849,7 +849,7 @@ struct file { #define f_dentry f_path.dentry #define f_vfsmnt f_path.mnt const struct file_operations *f_op; - spinlock_t f_lock; /* f_ep_links, f_flags */ + spinlock_t f_lock; /* f_ep_links, f_flags, no IRQ */ atomic_long_t f_count; unsigned int f_flags; fmode_t f_mode; |
