The patch titled
Subject: zsmalloc: use U suffix for negative literals being shifted
has been added to the -mm tree. Its filename is
zsmalloc-use-u-suffix-for-negative-literals-being-shifted.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/zsmalloc-use-u-suffix-for-negative-literals-being-shifted.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/zsmalloc-use-u-suffix-for-negative-literals-being-shifted.patch
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------------------------------------------------------
From: Nick Desaulniers <nick.desaulniers@xxxxxxxxx>
Subject: zsmalloc: use U suffix for negative literals being shifted
Fix warning about shifting unsigned literals being undefined behavior.
Link: http://lkml.kernel.org/r/1515642078-4259-1-git-send-email-nick.desaulniers@xxxxxxxxx
Signed-off-by: Nick Desaulniers <nick.desaulniers@xxxxxxxxx>
Suggested-by: Minchan Kim <minchan@xxxxxxxxxx>
Reviewed-by: Sergey Senozhatsky <sergey.senozhatsky@xxxxxxxxx>
Cc: Andy Shevchenko <andy.shevchenko@xxxxxxxxx>
Cc: Matthew Wilcox <willy@xxxxxxxxxxxxx>
Cc: Nick Desaulniers <nick.desaulniers@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
mm/zsmalloc.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff -puN mm/zsmalloc.c~zsmalloc-use-u-suffix-for-negative-literals-being-shifted mm/zsmalloc.c
--- a/mm/zsmalloc.c~zsmalloc-use-u-suffix-for-negative-literals-being-shifted
+++ a/mm/zsmalloc.c
@@ -1047,7 +1047,7 @@ static void init_zspage(struct size_clas
* Reset OBJ_TAG_BITS bit to last link to tell
* whether it's allocated object or not.
*/
- link->next = -1 << OBJ_TAG_BITS;
+ link->next = -1UL << OBJ_TAG_BITS;
}
kunmap_atomic(vaddr);
page = next_page;
_
Patches currently in -mm which might be from nick.desaulniers@xxxxxxxxx are
zsmalloc-use-u-suffix-for-negative-literals-being-shifted.patch
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