Messages in this thread | | | Date | Wed, 13 Apr 2022 14:01:19 +0800 | Subject | Re: [RFC PATCH -next V3 1/6] x86: fix function define in copy_mc_to_user | From | Tong Tiangen <> |
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在 2022/4/12 19:49, Kefeng Wang 写道: > > On 2022/4/12 15:25, Tong Tiangen wrote: >> X86 has it's implementation of copy_mc_to_user but not use #define to >> declare. >> >> This may cause problems, for example, if other architectures open >> CONFIG_ARCH_HAS_COPY_MC, but want to use copy_mc_to_user() outside the >> architecture, the code add to include/linux/uaddess.h is as follows: >> >> #ifndef copy_mc_to_user >> static inline unsigned long __must_check >> copy_mc_to_user(void *dst, const void *src, size_t cnt) >> { >> ... >> } >> #endif >> >> Then this definition will conflict with the implementation of X86 and >> cause >> compilation errors. > Does powerpc need this define?
Oh, missing that, will do next version. >> >> Fixes: ec6347bb4339 ("x86, powerpc: Rename memcpy_mcsafe() to >> copy_mc_to_{user, kernel}()") >> Signed-off-by: Tong Tiangen <tongtiangen@huawei.com> >> --- >> arch/x86/include/asm/uaccess.h | 1 + >> 1 file changed, 1 insertion(+) >> >> diff --git a/arch/x86/include/asm/uaccess.h >> b/arch/x86/include/asm/uaccess.h >> index f78e2b3501a1..e18c5f098025 100644 >> --- a/arch/x86/include/asm/uaccess.h >> +++ b/arch/x86/include/asm/uaccess.h >> @@ -415,6 +415,7 @@ copy_mc_to_kernel(void *to, const void *from, >> unsigned len); >> unsigned long __must_check >> copy_mc_to_user(void *to, const void *from, unsigned len); >> +#define copy_mc_to_user copy_mc_to_user >> #endif >> /* > .
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