From: tip-bot for Denys Vlasenko <tipbot@zytor.com>
To: linux-tip-commits@vger.kernel.org
Cc: ast@plumgrid.com, keescook@chromium.org, luto@amacapital.net,
dvlasenk@redhat.com, hpa@zytor.com, bp@alien8.de,
rostedt@goodmis.org, tglx@linutronix.de,
torvalds@linux-foundation.org, linux-kernel@vger.kernel.org,
wad@chromium.org, mingo@kernel.org, fweisbec@gmail.com,
oleg@redhat.com, luto@kernel.org
Subject: [tip:x86/asm] x86/asm/entry/32: Tidy up JNZ instructions after TESTs
Date: Sun, 12 Apr 2015 10:25:42 -0700 [thread overview]
Message-ID: <tip-54cfa458b492fcf76d653698d362743bcb329055@git.kernel.org> (raw)
In-Reply-To: <1428689620-21881-1-git-send-email-dvlasenk@redhat.com>
Commit-ID: 54cfa458b492fcf76d653698d362743bcb329055
Gitweb: http://git.kernel.org/tip/54cfa458b492fcf76d653698d362743bcb329055
Author: Denys Vlasenko <dvlasenk@redhat.com>
AuthorDate: Fri, 10 Apr 2015 20:13:40 +0200
Committer: Ingo Molnar <mingo@kernel.org>
CommitDate: Sat, 11 Apr 2015 10:40:02 +0200
x86/asm/entry/32: Tidy up JNZ instructions after TESTs
After TESTs, use logically correct JNZ mnemonic instead of JNE.
This doesn't change code:
md5:
c3005b39a11fe582b7df7908561ad4ee entry_32.o.before.asm
c3005b39a11fe582b7df7908561ad4ee entry_32.o.after.asm
Signed-off-by: Denys Vlasenko <dvlasenk@redhat.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Cc: Alexei Starovoitov <ast@plumgrid.com>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Kees Cook <keescook@chromium.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Will Drewry <wad@chromium.org>
Link: http://lkml.kernel.org/r/1428689620-21881-1-git-send-email-dvlasenk@redhat.com
[ Added object file comparison. ]
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/kernel/entry_32.S | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
diff --git a/arch/x86/kernel/entry_32.S b/arch/x86/kernel/entry_32.S
index 02bec0f..1c30976 100644
--- a/arch/x86/kernel/entry_32.S
+++ b/arch/x86/kernel/entry_32.S
@@ -435,7 +435,7 @@ sysenter_after_call:
TRACE_IRQS_OFF
movl TI_flags(%ebp), %ecx
testl $_TIF_ALLWORK_MASK, %ecx
- jne sysexit_audit
+ jnz sysexit_audit
sysenter_exit:
/* if something modifies registers it must also disable sysexit */
movl PT_EIP(%esp), %edx
@@ -463,7 +463,7 @@ sysenter_audit:
sysexit_audit:
testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx
- jne syscall_exit_work
+ jnz syscall_exit_work
TRACE_IRQS_ON
ENABLE_INTERRUPTS(CLBR_ANY)
movl %eax,%edx /* second arg, syscall return value */
@@ -475,7 +475,7 @@ sysexit_audit:
TRACE_IRQS_OFF
movl TI_flags(%ebp), %ecx
testl $(_TIF_ALLWORK_MASK & ~_TIF_SYSCALL_AUDIT), %ecx
- jne syscall_exit_work
+ jnz syscall_exit_work
movl PT_EAX(%esp),%eax /* reload syscall return value */
jmp sysenter_exit
#endif
@@ -513,7 +513,7 @@ syscall_exit:
TRACE_IRQS_OFF
movl TI_flags(%ebp), %ecx
testl $_TIF_ALLWORK_MASK, %ecx # current->work
- jne syscall_exit_work
+ jnz syscall_exit_work
restore_all:
TRACE_IRQS_IRET
@@ -615,7 +615,7 @@ work_notifysig: # deal with pending signals and
#ifdef CONFIG_VM86
testl $X86_EFLAGS_VM, PT_EFLAGS(%esp)
movl %esp, %eax
- jne work_notifysig_v86 # returning to kernel-space or
+ jnz work_notifysig_v86 # returning to kernel-space or
# vm86-space
1:
#else
prev parent reply other threads:[~2015-04-12 17:26 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2015-04-10 18:13 [PATCH] x86/asm/entry/32: tidy up JNZ insns " Denys Vlasenko
2015-04-10 18:39 ` Andy Lutomirski
2015-04-12 17:25 ` tip-bot for Denys Vlasenko [this message]
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