Hi!
Move is_vsyscall_vaddr() into asm/vsyscall.h to make it available for copy_from_kernel_nofault_allowed() in arch/x86/mm/maccess.c.
This seems to be just part of a patch -- it does not move anything -- and we should not really need it for 4.19, as we don't have those copy_from_kernel_nofault_allowed changes.
Best regards, Pavel
+++ b/arch/x86/include/asm/vsyscall.h @@ -4,6 +4,7 @@ #include <linux/seqlock.h> #include <uapi/asm/vsyscall.h> +#include <asm/page_types.h> #ifdef CONFIG_X86_VSYSCALL_EMULATION extern void map_vsyscall(void); @@ -22,4 +23,13 @@ static inline bool emulate_vsyscall(struct pt_regs *regs, unsigned long address) } #endif +/*
- The (legacy) vsyscall page is the long page in the kernel portion
- of the address space that has user-accessible permissions.
- */
+static inline bool is_vsyscall_vaddr(unsigned long vaddr) +{
- return unlikely((vaddr & PAGE_MASK) == VSYSCALL_ADDR);
+}
#endif /* _ASM_X86_VSYSCALL_H */