lkml.org 
[lkml]   [2019]   [Sep]   [4]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH] mm: Unsigned 'nr_pages' always larger than zero
Date
With the help of unsigned_lesser_than_zero.cocci. Unsigned 'nr_pages"'
compare with zero. And __get_user_pages_locked will return an long value.
Hence, Convert the long to compare with zero is feasible.

Signed-off-by: zhong jiang <zhongjiang@huawei.com>
---
mm/gup.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/gup.c b/mm/gup.c
index 23a9f9c..956d5a1 100644
--- a/mm/gup.c
+++ b/mm/gup.c
@@ -1508,7 +1508,7 @@ static long check_and_migrate_cma_pages(struct task_struct *tsk,
pages, vmas, NULL,
gup_flags);

- if ((nr_pages > 0) && migrate_allow) {
+ if (((long)nr_pages > 0) && migrate_allow) {
drain_allow = true;
goto check_again;
}
--
1.7.12.4
\
 
 \ /
  Last update: 2019-09-04 12:29    [W:0.084 / U:0.072 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site