From: "Gustavo A. R. Silva" <garsilva@embeddedor.com>
To: Thomas Gleixner <tglx@linutronix.de>,
Ingo Molnar <mingo@redhat.com>, "H. Peter Anvin" <hpa@zytor.com>,
x86@kernel.org
Cc: linux-kernel@vger.kernel.org,
"Gustavo A. R. Silva" <garsilva@embeddedor.com>,
Kees Cook <keescook@chromium.org>
Subject: [PATCH] x86/syscalls: Mark expected switch fall-throughs
Date: Mon, 27 Nov 2017 17:52:53 -0600 [thread overview]
Message-ID: <20171127235253.GA20384@embeddedor.com> (raw)
In preparation to enabling -Wimplicit-fallthrough, mark switch cases
where we are expecting to fall through.
Signed-off-by: Gustavo A. R. Silva <garsilva@embeddedor.com>
---
arch/x86/include/asm/syscall.h | 28 ++++++++++++++++++++++++++++
1 file changed, 28 insertions(+)
diff --git a/arch/x86/include/asm/syscall.h b/arch/x86/include/asm/syscall.h
index e3c95e8..63b01b1 100644
--- a/arch/x86/include/asm/syscall.h
+++ b/arch/x86/include/asm/syscall.h
@@ -121,23 +121,30 @@ static inline void syscall_get_arguments(struct task_struct *task,
case 0:
if (!n--) break;
*args++ = regs->bx;
+ /* fall through */
case 1:
if (!n--) break;
*args++ = regs->cx;
+ /* fall through */
case 2:
if (!n--) break;
*args++ = regs->dx;
+ /* fall through */
case 3:
if (!n--) break;
*args++ = regs->si;
+ /* fall through */
case 4:
if (!n--) break;
*args++ = regs->di;
+ /* fall through */
case 5:
if (!n--) break;
*args++ = regs->bp;
+ /* fall through */
case 6:
if (!n--) break;
+ /* fall through */
default:
BUG();
break;
@@ -148,23 +155,30 @@ static inline void syscall_get_arguments(struct task_struct *task,
case 0:
if (!n--) break;
*args++ = regs->di;
+ /* fall through */
case 1:
if (!n--) break;
*args++ = regs->si;
+ /* fall through */
case 2:
if (!n--) break;
*args++ = regs->dx;
+ /* fall through */
case 3:
if (!n--) break;
*args++ = regs->r10;
+ /* fall through */
case 4:
if (!n--) break;
*args++ = regs->r8;
+ /* fall through */
case 5:
if (!n--) break;
*args++ = regs->r9;
+ /* fall through */
case 6:
if (!n--) break;
+ /* fall through */
default:
BUG();
break;
@@ -182,23 +196,30 @@ static inline void syscall_set_arguments(struct task_struct *task,
case 0:
if (!n--) break;
regs->bx = *args++;
+ /* fall through */
case 1:
if (!n--) break;
regs->cx = *args++;
+ /* fall through */
case 2:
if (!n--) break;
regs->dx = *args++;
+ /* fall through */
case 3:
if (!n--) break;
regs->si = *args++;
+ /* fall through */
case 4:
if (!n--) break;
regs->di = *args++;
+ /* fall through */
case 5:
if (!n--) break;
regs->bp = *args++;
+ /* fall through */
case 6:
if (!n--) break;
+ /* fall through */
default:
BUG();
break;
@@ -209,23 +230,30 @@ static inline void syscall_set_arguments(struct task_struct *task,
case 0:
if (!n--) break;
regs->di = *args++;
+ /* fall through */
case 1:
if (!n--) break;
regs->si = *args++;
+ /* fall through */
case 2:
if (!n--) break;
regs->dx = *args++;
+ /* fall through */
case 3:
if (!n--) break;
regs->r10 = *args++;
+ /* fall through */
case 4:
if (!n--) break;
regs->r8 = *args++;
+ /* fall through */
case 5:
if (!n--) break;
regs->r9 = *args++;
+ /* fall through */
case 6:
if (!n--) break;
+ /* fall through */
default:
BUG();
break;
--
2.7.4
next reply other threads:[~2017-11-27 23:52 UTC|newest]
Thread overview: 27+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-11-27 23:52 Gustavo A. R. Silva [this message]
2017-11-28 13:49 ` [PATCH] x86/syscalls: Mark expected switch fall-throughs Thomas Gleixner
2017-11-28 18:05 ` Gustavo A. R. Silva
2017-11-28 18:10 ` Thomas Gleixner
2017-11-28 18:17 ` Thomas Gleixner
2017-11-28 18:22 ` Gustavo A. R. Silva
2017-11-28 18:27 ` Thomas Gleixner
2017-11-28 18:35 ` Thomas Gleixner
2017-11-28 18:45 ` Thomas Gleixner
2017-11-28 18:53 ` Gustavo A. R. Silva
2017-11-28 19:48 ` Thomas Gleixner
2017-11-28 19:00 ` Alan Cox
2017-11-28 19:10 ` Linus Torvalds
2017-11-28 19:59 ` Joe Perches
2017-11-28 20:08 ` Thomas Gleixner
2017-11-28 20:34 ` Kees Cook
2017-11-28 20:37 ` Gustavo A. R. Silva
2017-11-29 1:07 ` Joe Perches
2017-11-29 8:20 ` Geert Uytterhoeven
2017-11-28 20:11 ` Thomas Gleixner
2017-11-28 20:25 ` Gustavo A. R. Silva
2017-11-28 21:25 ` Thomas Gleixner
2017-11-29 15:10 ` Gustavo A. R. Silva
2017-11-29 15:14 ` Thomas Gleixner
2017-11-30 0:21 ` Kees Cook
-- strict thread matches above, loose matches on Subject: below --
2019-01-29 23:56 Gustavo A. R. Silva
2019-01-30 0:14 ` Thomas Gleixner
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