| Message ID | 20250221071624.1356899-1-suhui@nfschina.com (mailing list archive) |
|---|---|
| State | New |
| Headers | show |
| Series | include/linux/log2.h: mark is_power_of_2() with __always_inline | expand |
diff --git a/include/linux/log2.h b/include/linux/log2.h index 9f30d087a128..1366cb688a6d 100644 --- a/include/linux/log2.h +++ b/include/linux/log2.h @@ -41,7 +41,7 @@ int __ilog2_u64(u64 n) * *not* considered a power of two. * Return: true if @n is a power of 2, otherwise false. */ -static inline __attribute__((const)) +static __always_inline __attribute__((const)) bool is_power_of_2(unsigned long n) { return (n != 0 && ((n & (n - 1)) == 0));
When build kernel with randconfig, there is an error: In function ‘kvm_is_cr4_bit_set’,inlined from ‘kvm_update_cpuid_runtime’ at arch/x86/kvm/cpuid.c:310:9: include/linux/compiler_types.h:542:38: error: call to ‘__compiletime_assert_380’ declared with attribute error: BUILD_BUG_ON failed: !is_power_of_2(cr4_bit). '!is_power_of_2(X86_CR4_OSXSAVE)' is False, but gcc treats is_power_of_2() as non-inline function and a compilation error happens. Fix this by marking is_power_of_2() with __always_inline. Signed-off-by: Su Hui <suhui@nfschina.com> --- include/linux/log2.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)