xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

x86/entry: Drop asmlinkage from syscalls

Browse Source 
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
This commit is contained in:
Brian Gerst
2020-03-13 15:51:43 -04:00
committed by Thomas Gleixner
parent 25c619e59b
commit 0f78ff1711
5 changed files with 19 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

4
arch/x86/entry/syscall_x32.c
View File

@@ -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