On Tue, 9 Jul 2019 16:13:33 +0100 Mark Brown <broonie@xxxxxxxxxx> wrote: > On Tue, Jul 09, 2019 at 07:37:50AM -0700, kernelci.org bot wrote: > > Today's -next fails to build tinyconfig on arm64 and x86_64: > > > arm64: > > tinyconfig: (clang-8) FAIL > > tinyconfig: (gcc-8) FAIL > > > > x86_64: > > tinyconfig: (gcc-8) FAIL > > due to: > > > tinyconfig (arm64, gcc-8) — FAIL, 0 errors, 0 warnings, 0 section mismatches > > > > Section mismatches: > > WARNING: vmlinux.o(.meminit.text+0x430): Section mismatch in reference from the function sparse_buffer_alloc() to the function .init.text:sparse_buffer_free() > > FATAL: modpost: Section mismatches detected. > > (same error for all of them, the warning appears non-fatally in > other configs). This is caused by f13d13caa6ef2 (mm/sparse.c: > fix memory leak of sparsemap_buf in aliged memory) which adds a > reference from the __meminit annotated sparse_buffer_alloc() to > the newly added __init annotated sparse_buffer_free(). Thanks. Arnd just fixed this: From: Arnd Bergmann <arnd@xxxxxxxx> Subject: mm/sparse.c: mark sparse_buffer_free as __meminit Calling an __init function from a __meminit function is not allowed: WARNING: vmlinux.o(.meminit.text+0x30ff): Section mismatch in reference from the function sparse_buffer_alloc() to the function .init.text:sparse_buffer_free() The function __meminit sparse_buffer_alloc() references a function __init sparse_buffer_free(). If sparse_buffer_free is only used by sparse_buffer_alloc then annotate sparse_buffer_free with a matching annotation. Downgrade the annotation to __meminit for both, as they may be used in the hotplug case. Link: http://lkml.kernel.org/r/20190709185528.3251709-1-arnd@xxxxxxxx Fixes: mmotm ("mm/sparse.c: fix memory leak of sparsemap_buf in aliged memory") Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx> Cc: Lecopzer Chen <lecopzer.chen@xxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- mm/sparse.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) --- a/mm/sparse.c~mm-sparse-fix-memory-leak-of-sparsemap_buf-in-aliged-memory-fix +++ a/mm/sparse.c @@ -428,7 +428,7 @@ struct page __init *sparse_mem_map_popul static void *sparsemap_buf __meminitdata; static void *sparsemap_buf_end __meminitdata; -static inline void __init sparse_buffer_free(unsigned long size) +static inline void __meminit sparse_buffer_free(unsigned long size) { WARN_ON(!sparsemap_buf || size == 0); memblock_free_early(__pa(sparsemap_buf), size); _
