[PATCH -next] mm/madvise: Remove set but not used variable 'zone'

[Liu Shixin]

Fixes gcc '-Wunused-but-set-variable' warning:

mm/madvise.c: In function 'madvise_inject_error':
mm/madvise.c:882:15: warning: unused variable 'zone' [-Wunused-variable]

After 4b63fdbe2b25 ("mm: remove the now-unnecessary mmget_still_valid()
hack"), variable 'zone' is never used. Remove it to avoid build warning.

Signed-off-by: Liu Shixin <liushix...@huawei.com>
---
 mm/madvise.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/mm/madvise.c b/mm/madvise.c
index 460e19d60ba3..94b9d17331b9 100644
--- a/mm/madvise.c
+++ b/mm/madvise.c
@@ -879,7 +879,6 @@ static long madvise_remove(struct vm_area_struct *vma,
 static int madvise_inject_error(int behavior,
                unsigned long start, unsigned long end)
 {
-       struct zone *zone;
        unsigned long size;
 
        if (!capable(CAP_SYS_ADMIN))
-- 
2.25.1