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author | Dennis Zhou <dennis@kernel.org> | 2021-02-14 20:16:33 +0300 |
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committer | Dennis Zhou <dennis@kernel.org> | 2021-02-14 21:15:15 +0300 |
commit | 258e0815e2b1706e87c0d874211097aa8a7aa52f (patch) | |
tree | b98cacd48ddbbdfb81a243053bfd1fbf27d9a5fb /fs/orangefs | |
parent | d7d29ac76f7efb506bcecc092641e704f791d92d (diff) | |
download | linux-258e0815e2b1706e87c0d874211097aa8a7aa52f.tar.xz |
percpu: fix clang modpost section mismatch
pcpu_build_alloc_info() is an __init function that makes a call to
cpumask_clear_cpu(). With CONFIG_GCOV_PROFILE_ALL enabled, the inline
heuristics are modified and such cpumask_clear_cpu() which is marked
inline doesn't get inlined. Because it works on mask in __initdata,
modpost throws a section mismatch error.
Arnd sent a patch with the flatten attribute as an alternative [2]. I've
added it to compiler_attributes.h.
modpost complaint:
WARNING: modpost: vmlinux.o(.text+0x735425): Section mismatch in reference from the function cpumask_clear_cpu() to the variable .init.data:pcpu_build_alloc_info.mask
The function cpumask_clear_cpu() references
the variable __initdata pcpu_build_alloc_info.mask.
This is often because cpumask_clear_cpu lacks a __initdata
annotation or the annotation of pcpu_build_alloc_info.mask is wrong.
clang output:
mm/percpu.c:2724:5: remark: cpumask_clear_cpu not inlined into pcpu_build_alloc_info because too costly to inline (cost=725, threshold=325) [-Rpass-missed=inline]
[1] https://lore.kernel.org/linux-mm/202012220454.9F6Bkz9q-lkp@intel.com/
[2] https://lore.kernel.org/lkml/CAK8P3a2ZWfNeXKSm8K_SUhhwkor17jFo3xApLXjzfPqX0eUDUA@mail.gmail.com/
Reported-by: kernel test robot <lkp@intel.com>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Dennis Zhou <dennis@kernel.org>
Diffstat (limited to 'fs/orangefs')
0 files changed, 0 insertions, 0 deletions