Andy Lutomirski c68ca6787b x86/entry: Micro-optimize compat fast syscall arg fetch ... We're following a 32-bit pointer, and the uaccess code isn't smart enough to figure out that the access_ok() check isn't needed. This saves about three cycles on a cache-hot fast syscall. Signed-off-by: Andy Lutomirski <luto@kernel.org> Cc: Andy Lutomirski <luto@amacapital.net> Cc: Borislav Petkov <bp@alien8.de> Cc: Brian Gerst <brgerst@gmail.com> Cc: Denys Vlasenko <dvlasenk@redhat.com> Cc: H. Peter Anvin <hpa@zytor.com> Cc: Linus Torvalds <torvalds@linux-foundation.org> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: linux-kernel@vger.kernel.org Link: http://lkml.kernel.org/r/bdff034e2f23c5eb974c760cf494cb5bddce8f29.1444091585.git.luto@kernel.org Signed-off-by: Ingo Molnar <mingo@kernel.org>		2015-10-09 09:41:12 +02:00
..
syscalls	x86/entry/64/compat: Set up full pt_regs for all compat syscalls	2015-10-09 09:41:07 +02:00
vdso	x86/entry/32: Re-implement SYSENTER using the new C path	2015-10-09 09:41:10 +02:00
vsyscall	x86/entry/vsyscall: Fix undefined symbol warning	2015-09-21 09:56:59 +02:00
calling.h	x86/asm/entry/64: Save all regs on interrupt entry	2015-07-07 10:59:07 +02:00
common.c	x86/entry: Micro-optimize compat fast syscall arg fetch	2015-10-09 09:41:12 +02:00
entry_32.S	x86/entry/32: Re-implement SYSENTER using the new C path	2015-10-09 09:41:10 +02:00
entry_64_compat.S	x86/entry/compat: Implement opportunistic SYSRETL for compat syscalls	2015-10-09 09:41:10 +02:00
entry_64.S	x86/entry/64/compat: Migrate the body of the syscall entry to C	2015-10-09 09:41:09 +02:00
Makefile	x86/entry: Move C entry and exit code to arch/x86/entry/common.c	2015-07-07 10:59:05 +02:00
syscall_32.c	x86/syscalls: Give sys_call_ptr_t a useful type	2015-10-09 09:41:08 +02:00
syscall_64.c	x86/syscalls: Give sys_call_ptr_t a useful type	2015-10-09 09:41:08 +02:00
thunk_32.S	Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-22 17:59:09 -07:00
thunk_64.S	Merge branch 'x86-core-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip	2015-06-22 17:59:09 -07:00