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fs: remove fs.f_write_hint

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The value is now completely unused except for reporting it back through
the F_GET_FILE_RW_HINT ioctl, so remove the value and the two ioctls
for it.

Trying to use the F_SET_FILE_RW_HINT and F_GET_FILE_RW_HINT fcntls will
now return EINVAL, just like it would on a kernel that never supported
this functionality in the first place.

Signed-off-by: Christoph Hellwig <hch@lst.de>
Reviewed-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Chaitanya Kulkarni <kch@nvidia.com>
Link: https://lore.kernel.org/r/20220308060529.736277-3-hch@lst.de
Signed-off-by: Jens Axboe <axboe@kernel.dk>
This commit is contained in:
Christoph Hellwig
2022-03-08 07:05:29 +01:00
committed by Jens Axboe
parent 41d36a9f3e
commit 7b12e49669
3 changed files with 0 additions and 28 deletions
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9
include/linux/fs.h
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@@ -966,7 +966,6 @@ struct file {
* Must not be taken from IRQ context.
*/
spinlock_t f_lock;
enum rw_hint f_write_hint;
atomic_long_t f_count;
unsigned int f_flags;
fmode_t f_mode;
@@ -2214,14 +2213,6 @@ static inline bool HAS_UNMAPPED_ID(struct user_namespace *mnt_userns,
!gid_valid(i_gid_into_mnt(mnt_userns, inode));
}
static inline enum rw_hint file_write_hint(struct file *file)
{
if (file->f_write_hint != WRITE_LIFE_NOT_SET)
return file->f_write_hint;
return file_inode(file)->i_write_hint;
}
static inline int iocb_flags(struct file *file);
static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)