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authorJann Horn <jannh@google.com>2019-03-28 18:49:48 +0300
committerBorislav Petkov <bp@suse.de>2019-03-28 19:03:11 +0300
commitf6027c81099e87516d27d123867f10abd04b2d38 (patch)
treed354e092a893b6d9fa99e02b5dd80f8601df8a68 /arch
parent92c77f7c4d5dfaaf45b2ce19360e69977c264766 (diff)
downloadlinux-f6027c81099e87516d27d123867f10abd04b2d38.tar.xz
x86/cpufeature: Fix __percpu annotation in this_cpu_has()
&cpu_info.x86_capability is __percpu, and the second argument of x86_this_cpu_test_bit() is expected to be __percpu. Don't cast the __percpu away and then implicitly add it again. This gets rid of 106 lines of sparse warnings with the kernel config I'm using. Signed-off-by: Jann Horn <jannh@google.com> Signed-off-by: Borislav Petkov <bp@suse.de> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Ingo Molnar <mingo@redhat.com> Cc: Masahiro Yamada <yamada.masahiro@socionext.com> Cc: Nadav Amit <namit@vmware.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: x86-ml <x86@kernel.org> Link: https://lkml.kernel.org/r/20190328154948.152273-1-jannh@google.com
Diffstat (limited to 'arch')
-rw-r--r--arch/x86/include/asm/cpufeature.h5
1 files changed, 3 insertions, 2 deletions
diff --git a/arch/x86/include/asm/cpufeature.h b/arch/x86/include/asm/cpufeature.h
index ce95b8cbd229..0e56ff7e4848 100644
--- a/arch/x86/include/asm/cpufeature.h
+++ b/arch/x86/include/asm/cpufeature.h
@@ -112,8 +112,9 @@ extern const char * const x86_bug_flags[NBUGINTS*32];
test_cpu_cap(c, bit))
#define this_cpu_has(bit) \
- (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
- x86_this_cpu_test_bit(bit, (unsigned long *)&cpu_info.x86_capability))
+ (__builtin_constant_p(bit) && REQUIRED_MASK_BIT_SET(bit) ? 1 : \
+ x86_this_cpu_test_bit(bit, \
+ (unsigned long __percpu *)&cpu_info.x86_capability))
/*
* This macro is for detection of features which need kernel