[PATCH 1/2] fs: remove kiocb.ki_hint

Christoph Hellwig
2022-03-08T06:05:39Z

This field is entirely unused now except for a tracepoint in f2fs, so
remove it.

Signed-off-by: Christoph Hellwig <hch@lst.de>
---
fs/aio.c | 1 -
fs/cachefiles/io.c | 2 --
fs/f2fs/file.c | 6 ------
fs/io_uring.c | 1 -
include/linux/fs.h | 12 ------------
include/trace/events/f2fs.h | 3 +--
6 files changed, 1 insertion(+), 24 deletions(-)

diff --git a/fs/aio.c b/fs/aio.c
index 4ceba13a7db0f..eb0948bb74f18 100644
--- a/fs/aio.c
+++ b/fs/aio.c
@@ -1478,7 +1478,6 @@ static int aio_prep_rw(struct kiocb *req, const struct iocb *iocb)
req->ki_flags = iocb_flags(req->ki_filp);
if (iocb->aio_flags & IOCB_FLAG_RESFD)
req->ki_flags |= IOCB_EVENTFD;
- req->ki_hint = ki_hint_validate(file_write_hint(req->ki_filp));
if (iocb->aio_flags & IOCB_FLAG_IOPRIO) {
/*
* If the IOCB_FLAG_IOPRIO flag of aio_flags is set, then
diff --git a/fs/cachefiles/io.c b/fs/cachefiles/io.c
index 753986ea1583b..bc7c7a7d92600 100644
--- a/fs/cachefiles/io.c
+++ b/fs/cachefiles/io.c
@@ -138,7 +138,6 @@ static int cachefiles_read(struct netfs_cache_resources *cres,
ki->iocb.ki_filp = file;
ki->iocb.ki_pos = start_pos + skipped;
ki->iocb.ki_flags = IOCB_DIRECT;
- ki->iocb.ki_hint = ki_hint_validate(file_write_hint(file));
ki->iocb.ki_ioprio = get_current_ioprio();
ki->skipped = skipped;
ki->object = object;
@@ -313,7 +312,6 @@ static int cachefiles_write(struct netfs_cache_resources *cres,
ki->iocb.ki_filp = file;
ki->iocb.ki_pos = start_pos;
ki->iocb.ki_flags = IOCB_DIRECT | IOCB_WRITE;
- ki->iocb.ki_hint = ki_hint_validate(file_write_hint(file));
ki->iocb.ki_ioprio = get_current_ioprio();
ki->object = object;
ki->inval_counter = cres->inval_counter;
diff --git a/fs/f2fs/file.c b/fs/f2fs/file.c
index 3c98ef6af97d1..45076c01a2bab 100644
--- a/fs/f2fs/file.c
+++ b/fs/f2fs/file.c
@@ -4479,10 +4479,8 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
struct f2fs_inode_info *fi = F2FS_I(inode);
struct f2fs_sb_info *sbi = F2FS_I_SB(inode);
const bool do_opu = f2fs_lfs_mode(sbi);
- const int whint_mode = F2FS_OPTION(sbi).whint_mode;
const loff_t pos = iocb->ki_pos;
const ssize_t count = iov_iter_count(from);
- const enum rw_hint hint = iocb->ki_hint;
unsigned int dio_flags;
struct iomap_dio *dio;
ssize_t ret;
@@ -4515,8 +4513,6 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
if (do_opu)
down_read(&fi->i_gc_rwsem[READ]);
}
- if (whint_mode == WHINT_MODE_OFF)
- iocb->ki_hint = WRITE_LIFE_NOT_SET;

/*
* We have to use __iomap_dio_rw() and iomap_dio_complete() instead of
@@ -4539,8 +4535,6 @@ static ssize_t f2fs_dio_write_iter(struct kiocb *iocb, struct iov_iter *from,
ret = iomap_dio_complete(dio);
}

- if (whint_mode == WHINT_MODE_OFF)
- iocb->ki_hint = hint;
if (do_opu)
up_read(&fi->i_gc_rwsem[READ]);
up_read(&fi->i_gc_rwsem[WRITE]);
diff --git a/fs/io_uring.c b/fs/io_uring.c
index 23e7f93d39563..02400fd00501e 100644
--- a/fs/io_uring.c
+++ b/fs/io_uring.c
@@ -3790,7 +3790,6 @@ static int io_write_prep(struct io_kiocb *req, const struct io_uring_sqe *sqe)
{
if (unlikely(!(req->file->f_mode & FMODE_WRITE)))
return -EBADF;
- req->rw.kiocb.ki_hint = ki_hint_validate(file_write_hint(req->file));
return io_prep_rw(req, sqe);
}

diff --git a/include/linux/fs.h b/include/linux/fs.h
index e2d892b201b07..d5658ac5d8c65 100644
--- a/include/linux/fs.h
+++ b/include/linux/fs.h
@@ -327,7 +327,6 @@ struct kiocb {
void (*ki_complete)(struct kiocb *iocb, long ret);
void *private;
int ki_flags;
- u16 ki_hint;
u16 ki_ioprio; /* See linux/ioprio.h */
struct wait_page_queue *ki_waitq; /* for async buffered IO */
randomized_struct_fields_end
@@ -2225,21 +2224,11 @@ static inline enum rw_hint file_write_hint(struct file *file)

static inline int iocb_flags(struct file *file);

-static inline u16 ki_hint_validate(enum rw_hint hint)
-{
- typeof(((struct kiocb *)0)->ki_hint) max_hint = -1;
-
- if (hint <= max_hint)
- return hint;
- return 0;
-}
-
static inline void init_sync_kiocb(struct kiocb *kiocb, struct file *filp)
{
*kiocb = (struct kiocb) {
.ki_filp = filp,
.ki_flags = iocb_flags(filp),
- .ki_hint = ki_hint_validate(file_write_hint(filp)),
.ki_ioprio = get_current_ioprio(),
};
}
@@ -2250,7 +2239,6 @@ static inline void kiocb_clone(struct kiocb *kiocb, struct kiocb *kiocb_src,
*kiocb = (struct kiocb) {
.ki_filp = filp,
.ki_flags = kiocb_src->ki_flags,
- .ki_hint = kiocb_src->ki_hint,
.ki_ioprio = kiocb_src->ki_ioprio,
.ki_pos = kiocb_src->ki_pos,
};
diff --git a/include/trace/events/f2fs.h b/include/trace/events/f2fs.h
index f701bb23f83c4..1779e133cea0c 100644
--- a/include/trace/events/f2fs.h
+++ b/include/trace/events/f2fs.h
@@ -956,12 +956,11 @@ TRACE_EVENT(f2fs_direct_IO_enter,
__entry->rw = rw;
),

- TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu ki_flags = %x ki_hint = %x ki_ioprio = %x rw = %d",
+ TP_printk("dev = (%d,%d), ino = %lu pos = %lld len = %lu ki_flags = %x ki_ioprio = %x rw = %d",
show_dev_ino(__entry),
__entry->iocb->ki_pos,
__entry->len,
__entry->iocb->ki_flags,
- __entry->iocb->ki_hint,
__entry->iocb->ki_ioprio,
__entry->rw)
);
--
2.30.2