diff options
| author | Peng Hao <flyingpeng@tencent.com> | 2021-09-08 16:38:28 +0800 |
|---|---|---|
| committer | Miklos Szeredi <mszeredi@redhat.com> | 2021-10-22 17:03:01 +0200 |
| commit | 5fe0fc9f1de63de748b87f121c038d39192a271d (patch) | |
| tree | b9553fb2b3a09efa7044b1f667ef3c7c4f28d445 /fs/fuse/dev.c | |
| parent | bda9a71980e083699a0360963c0135657b73f47a (diff) | |
fuse: use kmap_local_page()
Due to the introduction of kmap_local_*, the storage of slots used for
short-term mapping has changed from per-CPU to per-thread. kmap_atomic()
disable preemption, while kmap_local_*() only disable migration.
There is no need to disable preemption in several kamp_atomic places used
in fuse.
Link: https://lwn.net/Articles/836144/
Signed-off-by: Peng Hao <flyingpeng@tencent.com>
Signed-off-by: Miklos Szeredi <mszeredi@redhat.com>
Diffstat (limited to 'fs/fuse/dev.c')
| -rw-r--r-- | fs/fuse/dev.c | 8 |
1 files changed, 4 insertions, 4 deletions
diff --git a/fs/fuse/dev.c b/fs/fuse/dev.c index dde341a6388a..491c092d427b 100644 --- a/fs/fuse/dev.c +++ b/fs/fuse/dev.c @@ -756,7 +756,7 @@ static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) { unsigned ncpy = min(*size, cs->len); if (val) { - void *pgaddr = kmap_atomic(cs->pg); + void *pgaddr = kmap_local_page(cs->pg); void *buf = pgaddr + cs->offset; if (cs->write) @@ -764,7 +764,7 @@ static int fuse_copy_do(struct fuse_copy_state *cs, void **val, unsigned *size) else memcpy(*val, buf, ncpy); - kunmap_atomic(pgaddr); + kunmap_local(pgaddr); *val += ncpy; } *size -= ncpy; @@ -949,10 +949,10 @@ static int fuse_copy_page(struct fuse_copy_state *cs, struct page **pagep, } } if (page) { - void *mapaddr = kmap_atomic(page); + void *mapaddr = kmap_local_page(page); void *buf = mapaddr + offset; offset += fuse_copy_do(cs, &buf, &count); - kunmap_atomic(mapaddr); + kunmap_local(mapaddr); } else offset += fuse_copy_do(cs, NULL, &count); } |