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Subject[PATCH] mm: try_to_unmap() is now void
Date
Fix the "CONFIG_MMU is not set" case of converting
try_to_unmap() from bool to void.

In file included from ../mm/vmscan.c:33:
../mm/vmscan.c: In function 'shrink_page_list':
../include/linux/rmap.h:294:34: warning: statement with no effect [-Wunused-value]
294 | #define try_to_unmap(page, refs) false
| ^~~~~
../mm/vmscan.c:1508:4: note: in expansion of macro 'try_to_unmap'
1508 | try_to_unmap(page, flags);
| ^~~~~~~~~~~~

Fixes: 1fb08ac63bee ("mm: rmap: make try_to_unmap() void function")
Signed-off-by: Randy Dunlap <rdunlap@infradead.org>
Cc: Yang Shi <shy828301@gmail.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
---
include/linux/rmap.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)

--- linux-next-20210701.orig/include/linux/rmap.h
+++ linux-next-20210701/include/linux/rmap.h
@@ -291,7 +291,7 @@ static inline int page_referenced(struct
return 0;
}

-#define try_to_unmap(page, refs) false
+#define try_to_unmap(page, refs) do {} while (0)

static inline int page_mkclean(struct page *page)
{
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