linux-kernel - [tip: objtool/urgent] x86/entry: Fix noinstr fail in __do_fast_syscall

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Date:   Tue, 22 Jun 2021 12:03:39 -0000
From:   "tip-bot2 for Peter Zijlstra" <tip-bot2@...utronix.de>
To:     linux-tip-commits@...r.kernel.org
Cc:     "Peter Zijlstra (Intel)" <peterz@...radead.org>,
        Ingo Molnar <mingo@...nel.org>, x86@...nel.org,
        linux-kernel@...r.kernel.org
Subject: [tip: objtool/urgent] x86/entry: Fix noinstr fail in __do_fast_syscall_32()

The following commit has been merged into the objtool/urgent branch of tip:

Commit-ID:     240001d4e3041832e8a2654adc3ccf1683132b92
Gitweb:        https://git.kernel.org/tip/240001d4e3041832e8a2654adc3ccf1683132b92
Author:        Peter Zijlstra <peterz@...radead.org>
AuthorDate:    Mon, 21 Jun 2021 13:12:34 +02:00
Committer:     Ingo Molnar <mingo@...nel.org>
CommitterDate: Tue, 22 Jun 2021 13:56:42 +02:00

x86/entry: Fix noinstr fail in __do_fast_syscall_32()

Fix:

  vmlinux.o: warning: objtool: __do_fast_syscall_32()+0xf5: call to trace_hardirqs_off() leaves .noinstr.text section

Fixes: 5d5675df792f ("x86/entry: Fix entry/exit mismatch on failed fast 32-bit syscalls")
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Signed-off-by: Ingo Molnar <mingo@...nel.org>
Link: https://lore.kernel.org/r/20210621120120.467898710@infradead.org
---
 arch/x86/entry/common.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/entry/common.c b/arch/x86/entry/common.c
index 7b2542b..a6bf516 100644
--- a/arch/x86/entry/common.c
+++ b/arch/x86/entry/common.c
@@ -130,8 +130,8 @@ static noinstr bool __do_fast_syscall_32(struct pt_regs *regs)
 		/* User code screwed up. */
 		regs->ax = -EFAULT;
 
-		instrumentation_end();
 		local_irq_disable();
+		instrumentation_end();
 		irqentry_exit_to_user_mode(regs);
 		return false;
 	}