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Date: Fri, 8 Aug 2014 19:44:38 +0200 From: Denys Vlasenko <dvlasenk@...hat.com> To: linux-kernel@...r.kernel.org Cc: Denys Vlasenko <dvlasenk@...hat.com>, Linus Torvalds <torvalds@...ux-foundation.org>, Oleg Nesterov <oleg@...hat.com>, "H. Peter Anvin" <hpa@...or.com>, Andy Lutomirski <luto@...capital.net>, Frederic Weisbecker <fweisbec@...il.com>, X86 ML <x86@...nel.org>, Alexei Starovoitov <ast@...mgrid.com>, Will Drewry <wad@...omium.org>, Kees Cook <keescook@...omium.org> Subject: [PATCH 15/17] x86: code shrink in paranoid_exit RESTORE_EXTRA_REGS + RESTORE_C_REGS looks small, but it's a lot of instructions (fourteen). Let's reuse them. Signed-off-by: Denys Vlasenko <dvlasenk@...hat.com> CC: Linus Torvalds <torvalds@...ux-foundation.org> CC: Oleg Nesterov <oleg@...hat.com> CC: "H. Peter Anvin" <hpa@...or.com> CC: Andy Lutomirski <luto@...capital.net> CC: Frederic Weisbecker <fweisbec@...il.com> CC: X86 ML <x86@...nel.org> CC: Alexei Starovoitov <ast@...mgrid.com> CC: Will Drewry <wad@...omium.org> CC: Kees Cook <keescook@...omium.org> CC: linux-kernel@...r.kernel.org --- arch/x86/kernel/entry_64.S | 6 ++---- 1 file changed, 2 insertions(+), 4 deletions(-) diff --git a/arch/x86/kernel/entry_64.S b/arch/x86/kernel/entry_64.S index f652ac6..7bc8c24 100644 --- a/arch/x86/kernel/entry_64.S +++ b/arch/x86/kernel/entry_64.S @@ -1288,12 +1288,10 @@ ENTRY(paranoid_exit) paranoid_swapgs: TRACE_IRQS_IRETQ 0 SWAPGS_UNSAFE_STACK - RESTORE_EXTRA_REGS - RESTORE_C_REGS - REMOVE_PTREGS_FROM_STACK 8 - jmp irq_return + jmp paranoid_restore1 paranoid_restore: TRACE_IRQS_IRETQ_DEBUG 0 +paranoid_restore1: RESTORE_EXTRA_REGS RESTORE_C_REGS REMOVE_PTREGS_FROM_STACK 8 -- 1.8.1.4 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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