Messages in this thread | | | Date | Thu, 9 Mar 2017 13:29:08 +0900 | From | Sergey Senozhatsky <> | Subject | "mm: fix lazyfree BUG_ON check in try_to_unmap_one()" build error |
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Hello Minchan,
/* I can't https://marc.info/?l=linux-kernel&m=148886631303107 thread in my mail box for some reason so the Reply-To message-id may be wrong. */
commit "mm: fix lazyfree BUG_ON check in try_to_unmap_one()" (mmotm fd07630cbf59bead90046dd3e5cfd891e58e6987)
if (VM_WARN_ON_ONCE(PageSwapBacked(page) != PageSwapCache(page))) { ... }
does not compile on !CONFIG_DEBUG_VM configs, because VM_WARN_ONCE() is
#define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e))))
In file included from ./include/linux/mmdebug.h:4:0, from ./include/linux/mm.h:8, from mm/rmap.c:48: mm/rmap.c: In function ‘try_to_unmap_one’: ./include/linux/bug.h:45:33: error: void value not ignored as it ought to be #define BUILD_BUG_ON_INVALID(e) ((void)(sizeof((__force long)(e)))) ^ ./include/linux/mmdebug.h:49:31: note: in expansion of macro ‘BUILD_BUG_ON_INVALID’ #define VM_WARN_ON_ONCE(cond) BUILD_BUG_ON_INVALID(cond) ^~~~~~~~~~~~~~~~~~~~ mm/rmap.c:1416:8: note: in expansion of macro ‘VM_WARN_ON_ONCE’ if (VM_WARN_ON_ONCE(PageSwapBacked(page) != ^~~~~~~~~~~~~~~
-ss
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