diff options
Diffstat (limited to 'include/linux/fs.h')
| -rw-r--r-- | include/linux/fs.h | 10 |
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/fs.h b/include/linux/fs.h index 6b062f62cbb8..3e53ba079f17 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -45,6 +45,7 @@ #include <linux/slab.h> #include <linux/maple_tree.h> #include <linux/rw_hint.h> +#include <linux/file_ref.h> #include <asm/byteorder.h> #include <uapi/linux/fs.h> @@ -1006,7 +1007,7 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index) /** * struct file - Represents a file - * @f_count: reference count + * @f_ref: reference count * @f_lock: Protects f_ep, f_flags. Must not be taken from IRQ context. * @f_mode: FMODE_* flags often used in hotpaths * @f_op: file operations @@ -1031,7 +1032,7 @@ static inline int ra_has_index(struct file_ra_state *ra, pgoff_t index) * @f_freeptr: Pointer used by SLAB_TYPESAFE_BY_RCU file cache (don't touch.) */ struct file { - atomic_long_t f_count; + file_ref_t f_ref; spinlock_t f_lock; fmode_t f_mode; const struct file_operations *f_op; @@ -1079,15 +1080,14 @@ struct file_handle { static inline struct file *get_file(struct file *f) { - long prior = atomic_long_fetch_inc_relaxed(&f->f_count); - WARN_ONCE(!prior, "struct file::f_count incremented from zero; use-after-free condition present!\n"); + file_ref_inc(&f->f_ref); return f; } struct file *get_file_rcu(struct file __rcu **f); struct file *get_file_active(struct file **f); -#define file_count(x) atomic_long_read(&(x)->f_count) +#define file_count(f) file_ref_read(&(f)->f_ref) #define MAX_NON_LFS ((1UL<<31) - 1) |