Commit 1bf94ca7 authored by Miklos Szeredi's avatar Miklos Szeredi
Browse files

fuse: use get_user_pages_fast() 



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

Signed-off-by: default avatarMiklos Szeredi <mszeredi@suse.cz>
parent 4aa0edd2

fs/fuse/dev.c

+1 −4
Original line number Diff line number Diff line
@@ -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);

fs/fuse/file.c

+1 −4
Original line number Diff line number Diff line
@@ -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;