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authorNick Piggin <npiggin@suse.de>2008-07-25 19:45:25 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2008-07-26 12:00:06 -0700
commitf5dd33c494a427b1d1a3b574de5c9e511c888864 (patch)
treefc6f61ffe488fe044f9e167b31b1c4ecd5f3f54c /fs/bio.c
parent8174c430e445a93016ef18f717fe570214fa38bf (diff)
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dio: use get_user_pages_fast
Use get_user_pages_fast in the common/generic block and fs direct IO paths. Signed-off-by: Nick Piggin <npiggin@suse.de> Cc: Dave Kleikamp <shaggy@austin.ibm.com> Cc: Andy Whitcroft <apw@shadowen.org> Cc: Ingo Molnar <mingo@elte.hu> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Andi Kleen <andi@firstfloor.org> Cc: Dave Kleikamp <shaggy@austin.ibm.com> Cc: Badari Pulavarty <pbadari@us.ibm.com> Cc: Zach Brown <zach.brown@oracle.com> Cc: Jens Axboe <jens.axboe@oracle.com> Reviewed-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs/bio.c')
-rw-r--r--fs/bio.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/bio.c b/fs/bio.c
index 88322b066acb..25f1af0d81e5 100644
--- a/fs/bio.c
+++ b/fs/bio.c
@@ -721,12 +721,8 @@ static struct bio *__bio_map_user_iov(struct request_queue *q,
const int local_nr_pages = end - start;
const int page_limit = cur_page + local_nr_pages;
- down_read(&current->mm->mmap_sem);
- ret = get_user_pages(current, current->mm, uaddr,
- local_nr_pages,
- write_to_vm, 0, &pages[cur_page], NULL);
- up_read(&current->mm->mmap_sem);
-
+ ret = get_user_pages_fast(uaddr, local_nr_pages,
+ write_to_vm, &pages[cur_page]);
if (ret < local_nr_pages) {
ret = -EFAULT;
goto out_unmap;