From: Jan Beulich <jbeulich@suse.com>
To: Andy Lutomirski <luto@kernel.org>
Cc: the arch/x86 maintainers <x86@kernel.org>,
lkml <linux-kernel@vger.kernel.org>
Subject: [PATCH] x86-64/entry: add instruction suffix to SYSRET
Date: Tue, 10 Dec 2019 11:48:33 +0100 [thread overview]
Message-ID: <cbecab05-9e95-5dec-ef81-499617c153a6@suse.com> (raw)
Omitting suffixes from instructions in AT&T mode is bad practice when
operand size cannot be determined by the assembler from register
operands, and is likely going to be warned about by upstream gas in the
future. Add the missing suffix here.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
--- a/arch/x86/entry/entry_64.S
+++ b/arch/x86/entry/entry_64.S
@@ -1728,7 +1728,7 @@ END(nmi)
SYM_CODE_START(ignore_sysret)
UNWIND_HINT_EMPTY
mov $-ENOSYS, %eax
- sysret
+ sysretl
SYM_CODE_END(ignore_sysret)
#endif
next reply other threads:[~2019-12-10 10:48 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-12-10 10:48 Jan Beulich [this message]
2019-12-10 15:29 ` Andy Lutomirski
2019-12-10 15:40 ` Jan Beulich
2019-12-12 21:43 ` Andy Lutomirski
2019-12-13 9:55 ` Jan Beulich
2019-12-13 17:49 ` Andy Lutomirski
2019-12-16 10:11 ` Jan Beulich
2019-12-16 15:23 ` Brian Gerst
2019-12-19 2:39 ` Andy Lutomirski
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