[patch 15/18] x86/entry: Make syscall functions static
From: Thomas Gleixner <tglx@kernel.org>
Date: 2026-07-07 19:07:01
Also in:
linux-alpha, linux-arch, linux-doc, linux-m68k, linux-mips, linux-riscv, linux-s390, linux-sh, linux-um, lkml, loongarch, sparclinux
They are only used in the respective source files. No point in exposing them. Signed-off-by: Thomas Gleixner <tglx@kernel.org> --- arch/x86/entry/syscall_32.c | 2 +- arch/x86/entry/syscall_64.c | 10 ++++++---- arch/x86/include/asm/syscall.h | 8 -------- 3 files changed, 7 insertions(+), 13 deletions(-)
--- a/arch/x86/entry/syscall_32.c
+++ b/arch/x86/entry/syscall_32.c@@ -41,7 +41,7 @@ const sys_call_ptr_t sys_call_table[] = #endif #define __SYSCALL(nr, sym) case nr: return __ia32_##sym(regs); -long ia32_sys_call(const struct pt_regs *regs, unsigned int nr) +static noinline long ia32_sys_call(const struct pt_regs *regs, unsigned int nr) { switch (nr) { #include <asm/syscalls_32.h> --- a/arch/x86/entry/syscall_64.c +++ b/arch/x86/entry/syscall_64.c
@@ -32,7 +32,7 @@ const sys_call_ptr_t sys_call_table[] = #undef __SYSCALL #define __SYSCALL(nr, sym) case nr: return __x64_##sym(regs); -long x64_sys_call(const struct pt_regs *regs, unsigned int nr) +static noinline long x64_sys_call(const struct pt_regs *regs, unsigned int nr) { switch (nr) { #include <asm/syscalls_64.h>
@@ -40,15 +40,17 @@ long x64_sys_call(const struct pt_regs * } } -#ifdef CONFIG_X86_X32_ABI -long x32_sys_call(const struct pt_regs *regs, unsigned int nr) +static noinline long x32_sys_call(const struct pt_regs *regs, unsigned int nr) { +#ifdef CONFIG_X86_X32_ABI switch (nr) { #include <asm/syscalls_x32.h> default: return __x64_sys_ni_syscall(regs); } -} +#else + return -ENOSYS; #endif +} static __always_inline bool do_syscall_x64(struct pt_regs *regs, int nr) { --- a/arch/x86/include/asm/syscall.h +++ b/arch/x86/include/asm/syscall.h
@@ -21,14 +21,6 @@ typedef long (*sys_call_ptr_t)(const str extern const sys_call_ptr_t sys_call_table[]; /* - * These may not exist, but still put the prototypes in so we - * can use IS_ENABLED(). - */ -extern long ia32_sys_call(const struct pt_regs *, unsigned int nr); -extern long x32_sys_call(const struct pt_regs *, unsigned int nr); -extern long x64_sys_call(const struct pt_regs *, unsigned int nr); - -/* * Only the low 32 bits of orig_ax are meaningful, so we return int. * This importantly ignores the high bits on 64-bit, so comparisons * sign-extend the low 32 bits.