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| author |   Brian Gerst <brgerst@gmail.com> | 2020-03-13 15:51:43 -0400 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2020-03-21 16:03:25 +0100 |
| commit | 0f78ff17112d8b3469b805ff4ea9780cc1e5c93b (patch) | |
| tree | 43bab69de60c1a887f54180536717883215152ca /arch/x86/entry | |
| parent | x86/entry/32: Enable pt_regs based syscalls (diff) | |
| download | linux-dev-0f78ff17112d8b3469b805ff4ea9780cc1e5c93b.tar.xz linux-dev-0f78ff17112d8b3469b805ff4ea9780cc1e5c93b.zip | |
x86/entry: Drop asmlinkage from syscalls
asmlinkage is no longer required since the syscall ABI is now fully under
x86 architecture control. This makes the 32-bit native syscalls a bit more
effecient by passing in regs via EAX instead of on the stack.
Signed-off-by: Brian Gerst <brgerst@gmail.com>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Dominik Brodowski <linux@dominikbrodowski.net>
Reviewed-by: Andy Lutomirski <luto@kernel.org>
Link: https://lkml.kernel.org/r/20200313195144.164260-18-brgerst@gmail.com
Diffstat (limited to 'arch/x86/entry')
| -rw-r--r-- | arch/x86/entry/syscall_32.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/syscall_64.c | 2 | ||||
| -rw-r--r-- | arch/x86/entry/syscall_x32.c | 4 |
3 files changed, 4 insertions, 4 deletions
diff --git a/arch/x86/entry/syscall_32.c b/arch/x86/entry/syscall_32.c index 097413c705ad..86eb0d89d46f 100644 --- a/arch/x86/entry/syscall_32.c +++ b/arch/x86/entry/syscall_32.c @@ -8,7 +8,7 @@ #include <asm/unistd.h> #include <asm/syscall.h> -#define __SYSCALL_I386(nr, sym) extern asmlinkage long __ia32_##sym(const struct pt_regs *); +#define __SYSCALL_I386(nr, sym) extern long __ia32_##sym(const struct pt_regs *); #include <asm/syscalls_32.h> #undef __SYSCALL_I386 diff --git a/arch/x86/entry/syscall_64.c b/arch/x86/entry/syscall_64.c index 66d3e65e3b6b..1594ec72bcbb 100644 --- a/arch/x86/entry/syscall_64.c +++ b/arch/x86/entry/syscall_64.c @@ -11,7 +11,7 @@ #define __SYSCALL_X32(nr, sym) #define __SYSCALL_COMMON(nr, sym) __SYSCALL_64(nr, sym) -#define __SYSCALL_64(nr, sym) extern asmlinkage long __x64_##sym(const struct pt_regs *); +#define __SYSCALL_64(nr, sym) extern long __x64_##sym(const struct pt_regs *); #include <asm/syscalls_64.h> #undef __SYSCALL_64 diff --git a/arch/x86/entry/syscall_x32.c b/arch/x86/entry/syscall_x32.c index 2fb09efd7b40..3d8d70d3896c 100644 --- a/arch/x86/entry/syscall_x32.c +++ b/arch/x86/entry/syscall_x32.c @@ -10,8 +10,8 @@ #define __SYSCALL_64(nr, sym) -#define __SYSCALL_X32(nr, sym) extern asmlinkage long __x32_##sym(const struct pt_regs *); -#define __SYSCALL_COMMON(nr, sym) extern asmlinkage long __x64_##sym(const struct pt_regs *); +#define __SYSCALL_X32(nr, sym) extern long __x32_##sym(const struct pt_regs *); +#define __SYSCALL_COMMON(nr, sym) extern long __x64_##sym(const struct pt_regs *); #include <asm/syscalls_64.h> #undef __SYSCALL_X32 #undef __SYSCALL_COMMON |