Subject: [PATCH 7/7] mm/zsmalloc.c: fix -Wunneeded-internal-declaration warning

From: Nick Desaulniers <[email-masked]>
Date: Mon, 10 Jul 2017 15:47:26 -0700

commit 3457f4147675108aa83f9f33c136f06bb9f8518f upstream.

is_first_page() is only called from the macro VM_BUG_ON_PAGE() which is
only compiled in as a runtime check when CONFIG_DEBUG_VM is set,
otherwise is checked at compile time and not actually compiled in.

Fixes the following warning, found with Clang:

  mm/zsmalloc.c:472:12: warning: function 'is_first_page' is not needed and will not be emitted [-Wunneeded-internal-declaration]
  static int is_first_page(struct page *page)
           ^

Link: http://lkml.kernel.org/r/[email-masked]
Signed-off-by: Nick Desaulniers <[email-masked]>
Reviewed-by: Sergey Senozhatsky <[email-masked]>
Acked-by: Minchan Kim <[email-masked]>
Signed-off-by: Andrew Morton <[email-masked]>
Signed-off-by: Linus Torvalds <[email-masked]>
Signed-off-by: Nathan Chancellor <[email-masked]>
---
 mm/zsmalloc.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/mm/zsmalloc.c b/mm/zsmalloc.c
index 3d675c5d92f1..cf15851a7d2f 100644
--- a/mm/zsmalloc.c
+++ b/mm/zsmalloc.c
@@ -473,7 +473,7 @@ static bool is_zspage_isolated(struct zspage *zspage)
 	return zspage->isolated;
 }
 
-static int is_first_page(struct page *page)
+static __maybe_unused int is_first_page(struct page *page)
 {
 	return PagePrivate(page);
 }
-- 
2.21.0