From 8dfdbe4368c09d9eeae2df8968ee6c345ec8c1b5 Mon Sep 17 00:00:00 2001 From: Christophe Leroy Date: Mon, 9 May 2022 07:36:18 +0200 Subject: [PATCH] powerpc/inst: Add __copy_inst_from_kernel_nofault() On the same model as get_user() versus __get_user(), introduce __copy_inst_from_kernel_nofault() which doesn't check address. To be used by callers that have already checked that the adress is a kernel address. Signed-off-by: Christophe Leroy Signed-off-by: Michael Ellerman Link: https://lore.kernel.org/r/1f3702890d6dbd64702b61834753bcc96851c18c.1652074503.git.christophe.leroy@csgroup.eu --- arch/powerpc/include/asm/inst.h | 13 +++++++++---- 1 file changed, 9 insertions(+), 4 deletions(-) diff --git a/arch/powerpc/include/asm/inst.h b/arch/powerpc/include/asm/inst.h index 80b6d74146c6..b49aae9f6f27 100644 --- a/arch/powerpc/include/asm/inst.h +++ b/arch/powerpc/include/asm/inst.h @@ -158,13 +158,10 @@ static inline char *__ppc_inst_as_str(char str[PPC_INST_STR_LEN], ppc_inst_t x) __str; \ }) -static inline int copy_inst_from_kernel_nofault(ppc_inst_t *inst, u32 *src) +static inline int __copy_inst_from_kernel_nofault(ppc_inst_t *inst, u32 *src) { unsigned int val, suffix; - if (unlikely(!is_kernel_addr((unsigned long)src))) - return -ERANGE; - /* See https://github.com/ClangBuiltLinux/linux/issues/1521 */ #if defined(CONFIG_CC_IS_CLANG) && CONFIG_CLANG_VERSION < 140000 val = suffix = 0; @@ -181,4 +178,12 @@ static inline int copy_inst_from_kernel_nofault(ppc_inst_t *inst, u32 *src) return -EFAULT; } +static inline int copy_inst_from_kernel_nofault(ppc_inst_t *inst, u32 *src) +{ + if (unlikely(!is_kernel_addr((unsigned long)src))) + return -ERANGE; + + return __copy_inst_from_kernel_nofault(inst, src); +} + #endif /* _ASM_POWERPC_INST_H */