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* [PATCH] memblock: fix section mismatch warning again
@ 2021-03-16 17:13 ` Mike Rapoport
  0 siblings, 0 replies; 7+ messages in thread
From: Mike Rapoport @ 2021-03-16 17:13 UTC (permalink / raw)
  To: Andrew Morton
  Cc: Arnd Bergmann, David Hildenbrand, Mike Rapoport, Mike Rapoport,
	Nick Desaulniers, clang-built-linux, kbuild-all, linux-kernel,
	linux-mm, kernel test robot

From: Mike Rapoport <>

Commit 34dc2efb39a2 ("memblock: fix section mismatch warning") marked
memblock_bottom_up() and memblock_set_bottom_up() as __init, but they could
be referenced from non-init functions like memblock_find_in_range_node() on
architectures that enable CONFIG_ARCH_KEEP_MEMBLOCK.

For such builds kernel test robot reports:
All warnings (new ones prefixed by >>, old ones prefixed by <<):

>> WARNING: modpost: vmlinux.o(.text+0x74fea4): Section mismatch in reference from the function memblock_find_in_range_node() to the function .init.text:memblock_bottom_up()
The function memblock_find_in_range_node() references
the function __init memblock_bottom_up().
This is often because memblock_find_in_range_node lacks a __init
annotation or the annotation of memblock_bottom_up is wrong.

Replace __init annotations with __init_memblock annotations so that the
appropriate section will be selected depending on

Fixes: 34dc2efb39a2 ("memblock: fix section mismatch warning")
Signed-off-by: Mike Rapoport <>
Reported-by: kernel test robot <>
Reviewed-by: Arnd Bergmann <>

@Andrew, please let me know if you'd prefer this merged via memblock tree.

 include/linux/memblock.h | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/include/linux/memblock.h b/include/linux/memblock.h
index d13e3cd938b4..5984fff3f175 100644
--- a/include/linux/memblock.h
+++ b/include/linux/memblock.h
@@ -460,7 +460,7 @@ static inline void memblock_free_late(phys_addr_t base, phys_addr_t size)
  * Set the allocation direction to bottom-up or top-down.
-static inline __init void memblock_set_bottom_up(bool enable)
+static inline __init_memblock void memblock_set_bottom_up(bool enable)
 	memblock.bottom_up = enable;
@@ -470,7 +470,7 @@ static inline __init void memblock_set_bottom_up(bool enable)
  * if this is true, that said, memblock will allocate memory
  * in bottom-up direction.
-static inline __init bool memblock_bottom_up(void)
+static inline __init_memblock bool memblock_bottom_up(void)
 	return memblock.bottom_up;

^ permalink raw reply related	[flat|nested] 7+ messages in thread

end of thread, other threads:[~2021-03-16 18:03 UTC | newest]

Thread overview: 7+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2021-03-16 17:13 [PATCH] memblock: fix section mismatch warning again Mike Rapoport
2021-03-16 17:13 ` Mike Rapoport
2021-03-16 17:46 ` David Hildenbrand
2021-03-16 17:46   ` David Hildenbrand
2021-03-16 18:01 ` Nick Desaulniers
2021-03-16 18:01   ` Nick Desaulniers
2021-03-16 18:01   ` Nick Desaulniers

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