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fuse: use get_user_pages_fast()

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Replace uses of get_user_pages() with get_user_pages_fast().  It looks
nicer and should be faster in most cases.

Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
This commit is contained in:
Miklos Szeredi 2010-05-25 15:06:06 +02:00
parent 4aa0edd294
commit 1bf94ca73e
2 changed files with 2 additions and 8 deletions
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5
fs/fuse/dev.c
View File

@ -551,10 +551,7 @@ static int fuse_copy_fill(struct fuse_copy_state *cs)
cs->iov++;
cs->nr_segs--;
}
down_read(&current->mm->mmap_sem);
err = get_user_pages(current, current->mm, cs->addr, 1, cs->write, 0,
&cs->pg, NULL);
up_read(&current->mm->mmap_sem);
err = get_user_pages_fast(cs->addr, 1, cs->write, &cs->pg);
if (err < 0)
return err;
BUG_ON(err != 1);

5
fs/fuse/file.c
View File

@ -994,10 +994,7 @@ static int fuse_get_user_pages(struct fuse_req *req, const char __user *buf,
nbytes = min_t(size_t, nbytes, FUSE_MAX_PAGES_PER_REQ << PAGE_SHIFT);
npages = (nbytes + offset + PAGE_SIZE - 1) >> PAGE_SHIFT;
npages = clamp(npages, 1, FUSE_MAX_PAGES_PER_REQ);
down_read(&current->mm->mmap_sem);
npages = get_user_pages(current, current->mm, user_addr, npages, !write,
0, req->pages, NULL);
up_read(&current->mm->mmap_sem);
npages = get_user_pages_fast(user_addr, npages, !write, req->pages);
if (npages < 0)
return npages;