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| 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 | |
| parent | bda9a71980e083699a0360963c0135657b73f47a (diff) | |
| download | linux-stable-5fe0fc9f1de63de748b87f121c038d39192a271d.tar.gz linux-stable-5fe0fc9f1de63de748b87f121c038d39192a271d.tar.bz2 linux-stable-5fe0fc9f1de63de748b87f121c038d39192a271d.zip | |
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')
| -rw-r--r-- | fs/fuse/dev.c | 8 | ||||
| -rw-r--r-- | fs/fuse/ioctl.c | 4 | ||||
| -rw-r--r-- | fs/fuse/readdir.c | 4 |
3 files changed, 8 insertions, 8 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); } diff --git a/fs/fuse/ioctl.c b/fs/fuse/ioctl.c index 546ea3d58fb4..fbc09dab1f85 100644 --- a/fs/fuse/ioctl.c +++ b/fs/fuse/ioctl.c @@ -286,11 +286,11 @@ long fuse_do_ioctl(struct file *file, unsigned int cmd, unsigned long arg, in_iovs + out_iovs > FUSE_IOCTL_MAX_IOV) goto out; - vaddr = kmap_atomic(ap.pages[0]); + vaddr = kmap_local_page(ap.pages[0]); err = fuse_copy_ioctl_iovec(fm->fc, iov_page, vaddr, transferred, in_iovs + out_iovs, (flags & FUSE_IOCTL_COMPAT) != 0); - kunmap_atomic(vaddr); + kunmap_local(vaddr); if (err) goto out; diff --git a/fs/fuse/readdir.c b/fs/fuse/readdir.c index bc267832310c..e38ac983435a 100644 --- a/fs/fuse/readdir.c +++ b/fs/fuse/readdir.c @@ -76,11 +76,11 @@ static void fuse_add_dirent_to_cache(struct file *file, WARN_ON(fi->rdc.pos != pos)) goto unlock; - addr = kmap_atomic(page); + addr = kmap_local_page(page); if (!offset) clear_page(addr); memcpy(addr + offset, dirent, reclen); - kunmap_atomic(addr); + kunmap_local(addr); fi->rdc.size = (index << PAGE_SHIFT) + offset + reclen; fi->rdc.pos = dirent->off; unlock: |