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From: Miklos Szeredi on 28 Apr 2010 12:20
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(a)suse.cz>
---
fs/fuse/dev.c | 5 +----
fs/fuse/file.c | 5 +----
2 files changed, 2 insertions(+), 8 deletions(-)

Index: linux-2.6/fs/fuse/dev.c
===================================================================
--- linux-2.6.orig/fs/fuse/dev.c 2010-04-26 11:33:57.000000000 +0200
+++ linux-2.6/fs/fuse/dev.c 2010-04-28 15:50:32.000000000 +0200
@@ -551,10 +551,7 @@ static int fuse_copy_fill(struct fuse_co
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);
Index: linux-2.6/fs/fuse/file.c
===================================================================
--- linux-2.6.orig/fs/fuse/file.c 2010-04-26 11:33:57.000000000 +0200
+++ linux-2.6/fs/fuse/file.c 2010-04-28 15:50:32.000000000 +0200
@@ -994,10 +994,7 @@ static int fuse_get_user_pages(struct fu
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;


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