commit 8aa7e847d834ed937a9ad37a0f2ad5b8584c1ab0
author Jens Axboe <jens.axboe@oracle.com> Thu Jul 09 14:52:32 2009 +0200
committer Jens Axboe <axboe@carl.(none)> Fri Jul 10 20:31:53 2009 +0200
tree 76c8b4f1362a928d426f2201790ab5d128f57724
parent c2cc49a2f8a479dde96a599646d30b6cc9dbed78

Fix congestion_wait() sync/async vs read/write confusion

Commit 1faa16d22877f4839bd433547d770c676d1d964c accidentally broke
the bdi congestion wait queue logic, causing us to wait on congestion
for WRITE (== 1) when we really wanted BLK_RW_ASYNC (== 0) instead.

Signed-off-by: Jens Axboe <jens.axboe@oracle.com>

arch/x86/lib/usercopy_32.c

diff --git a/arch/x86/lib/usercopy_32.c b/arch/x86/lib/usercopy_32.c
index 7c8ca91..1f118d4 100644
--- a/arch/x86/lib/usercopy_32.c
+++ b/arch/x86/lib/usercopy_32.c
@@ -751,7 +751,7 @@
 
 			if (retval == -ENOMEM && is_global_init(current)) {
 				up_read(&current->mm->mmap_sem);
-				congestion_wait(WRITE, HZ/50);
+				congestion_wait(BLK_RW_ASYNC, HZ/50);
 				goto survive;
 			}