* [PATCH] gdbstub: mark expected switch fall-throughs
@ 2019-02-26 19:16 Gustavo A. R. Silva
2019-02-26 20:47 ` Jason Wessel
0 siblings, 1 reply; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-02-26 19:16 UTC (permalink / raw)
To: Jason Wessel, Daniel Thompson
Cc: kgdb-bugreport, linux-kernel, Gustavo A. R. Silva, Kees Cook
In preparation to enabling -Wimplicit-fallthrough, mark switch
cases where we are expecting to fall through.
This patch fixes the following warnings:
kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’:
kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (remcom_in_buffer[1] == '\0') {
^
kernel/debug/gdbstub.c:1036:3: note: here
case 'C': /* Exception passing */
^~~~
kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
if (tmp == 0)
^
kernel/debug/gdbstub.c:1043:3: note: here
case 'c': /* Continue packet */
^~~~
kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
dbg_activate_sw_breakpoints();
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
kernel/debug/gdbstub.c:1052:3: note: here
default:
^~~~~~~
Warning level 3 was used: -Wimplicit-fallthrough=3
Notice that, in this particular case, the code comment is modified
in accordance with what GCC is expecting to find.
This patch is part of the ongoing efforts to enable
-Wimplicit-fallthrough.
Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
---
kernel/debug/gdbstub.c | 5 +++--
1 file changed, 3 insertions(+), 2 deletions(-)
diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
index 7510dc687c0d..9f267b8905b4 100644
--- a/kernel/debug/gdbstub.c
+++ b/kernel/debug/gdbstub.c
@@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
return DBG_PASS_EVENT;
}
#endif
+ /* Fall through */
case 'C': /* Exception passing */
tmp = gdb_cmd_exception_pass(ks);
if (tmp > 0)
goto default_handle;
if (tmp == 0)
break;
- /* Fall through on tmp < 0 */
+ /* Fall through - on tmp < 0 */
case 'c': /* Continue packet */
case 's': /* Single step packet */
if (kgdb_contthread && kgdb_contthread != current) {
@@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
break;
}
dbg_activate_sw_breakpoints();
- /* Fall through to default processing */
+ /* Fall through - to default processing */
default:
default_handle:
error = kgdb_arch_handle_exception(ks->ex_vector,
--
2.21.0
^ permalink raw reply related [flat|nested] 6+ messages in thread* Re: [PATCH] gdbstub: mark expected switch fall-throughs
2019-02-26 19:16 [PATCH] gdbstub: mark expected switch fall-throughs Gustavo A. R. Silva
@ 2019-02-26 20:47 ` Jason Wessel
2019-02-26 20:59 ` Gustavo A. R. Silva
2019-04-01 19:57 ` Gustavo A. R. Silva
0 siblings, 2 replies; 6+ messages in thread
From: Jason Wessel @ 2019-02-26 20:47 UTC (permalink / raw)
To: Gustavo A. R. Silva, Daniel Thompson
Cc: kgdb-bugreport, linux-kernel, Kees Cook
We'll have to fix them at some point.
Acked-by: Jason Wessel <jason.wessel@windriver.com>
Cheers,
Jason.
On 2/26/19 1:16 PM, Gustavo A. R. Silva wrote:
> In preparation to enabling -Wimplicit-fallthrough, mark switch
> cases where we are expecting to fall through.
>
> This patch fixes the following warnings:
>
> kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’:
> kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
> if (remcom_in_buffer[1] == '\0') {
> ^
> kernel/debug/gdbstub.c:1036:3: note: here
> case 'C': /* Exception passing */
> ^~~~
> kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
> if (tmp == 0)
> ^
> kernel/debug/gdbstub.c:1043:3: note: here
> case 'c': /* Continue packet */
> ^~~~
> kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> dbg_activate_sw_breakpoints();
> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> kernel/debug/gdbstub.c:1052:3: note: here
> default:
> ^~~~~~~
>
> Warning level 3 was used: -Wimplicit-fallthrough=3
>
> Notice that, in this particular case, the code comment is modified
> in accordance with what GCC is expecting to find.
>
> This patch is part of the ongoing efforts to enable
> -Wimplicit-fallthrough.
>
> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> ---
> kernel/debug/gdbstub.c | 5 +++--
> 1 file changed, 3 insertions(+), 2 deletions(-)
>
> diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
> index 7510dc687c0d..9f267b8905b4 100644
> --- a/kernel/debug/gdbstub.c
> +++ b/kernel/debug/gdbstub.c
> @@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
> return DBG_PASS_EVENT;
> }
> #endif
> + /* Fall through */
> case 'C': /* Exception passing */
> tmp = gdb_cmd_exception_pass(ks);
> if (tmp > 0)
> goto default_handle;
> if (tmp == 0)
> break;
> - /* Fall through on tmp < 0 */
> + /* Fall through - on tmp < 0 */
> case 'c': /* Continue packet */
> case 's': /* Single step packet */
> if (kgdb_contthread && kgdb_contthread != current) {
> @@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
> break;
> }
> dbg_activate_sw_breakpoints();
> - /* Fall through to default processing */
> + /* Fall through - to default processing */
> default:
> default_handle:
> error = kgdb_arch_handle_exception(ks->ex_vector,
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] gdbstub: mark expected switch fall-throughs
2019-02-26 20:47 ` Jason Wessel
@ 2019-02-26 20:59 ` Gustavo A. R. Silva
2019-04-01 19:57 ` Gustavo A. R. Silva
1 sibling, 0 replies; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-02-26 20:59 UTC (permalink / raw)
To: Jason Wessel, Daniel Thompson; +Cc: kgdb-bugreport, linux-kernel, Kees Cook
On 2/26/19 2:47 PM, Jason Wessel wrote:
> We'll have to fix them at some point.
>
Yep. And we're about to fix them all.
> Acked-by: Jason Wessel <jason.wessel@windriver.com>
>
Thanks, Jason.
--
Gustavo
>
> Cheers,
> Jason.
>
> On 2/26/19 1:16 PM, Gustavo A. R. Silva wrote:
>> In preparation to enabling -Wimplicit-fallthrough, mark switch
>> cases where we are expecting to fall through.
>>
>> This patch fixes the following warnings:
>>
>> kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’:
>> kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> if (remcom_in_buffer[1] == '\0') {
>> ^
>> kernel/debug/gdbstub.c:1036:3: note: here
>> case 'C': /* Exception passing */
>> ^~~~
>> kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> if (tmp == 0)
>> ^
>> kernel/debug/gdbstub.c:1043:3: note: here
>> case 'c': /* Continue packet */
>> ^~~~
>> kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> dbg_activate_sw_breakpoints();
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/debug/gdbstub.c:1052:3: note: here
>> default:
>> ^~~~~~~
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> Notice that, in this particular case, the code comment is modified
>> in accordance with what GCC is expecting to find.
>>
>> This patch is part of the ongoing efforts to enable
>> -Wimplicit-fallthrough.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>> ---
>> kernel/debug/gdbstub.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
>> index 7510dc687c0d..9f267b8905b4 100644
>> --- a/kernel/debug/gdbstub.c
>> +++ b/kernel/debug/gdbstub.c
>> @@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
>> return DBG_PASS_EVENT;
>> }
>> #endif
>> + /* Fall through */
>> case 'C': /* Exception passing */
>> tmp = gdb_cmd_exception_pass(ks);
>> if (tmp > 0)
>> goto default_handle;
>> if (tmp == 0)
>> break;
>> - /* Fall through on tmp < 0 */
>> + /* Fall through - on tmp < 0 */
>> case 'c': /* Continue packet */
>> case 's': /* Single step packet */
>> if (kgdb_contthread && kgdb_contthread != current) {
>> @@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
>> break;
>> }
>> dbg_activate_sw_breakpoints();
>> - /* Fall through to default processing */
>> + /* Fall through - to default processing */
>> default:
>> default_handle:
>> error = kgdb_arch_handle_exception(ks->ex_vector,
>>
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] gdbstub: mark expected switch fall-throughs
2019-02-26 20:47 ` Jason Wessel
2019-02-26 20:59 ` Gustavo A. R. Silva
@ 2019-04-01 19:57 ` Gustavo A. R. Silva
2019-04-04 10:12 ` Daniel Thompson
1 sibling, 1 reply; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-04-01 19:57 UTC (permalink / raw)
To: Jason Wessel, Daniel Thompson; +Cc: kgdb-bugreport, linux-kernel, Kees Cook
On 2/26/19 2:47 PM, Jason Wessel wrote:
> We'll have to fix them at some point.
>
> Acked-by: Jason Wessel <jason.wessel@windriver.com>
>
Thank you, Jason.
Friendly ping:
Who can take this?
Thanks
--
Gustavo
>
> Cheers,
> Jason.
>
> On 2/26/19 1:16 PM, Gustavo A. R. Silva wrote:
>> In preparation to enabling -Wimplicit-fallthrough, mark switch
>> cases where we are expecting to fall through.
>>
>> This patch fixes the following warnings:
>>
>> kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’:
>> kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> if (remcom_in_buffer[1] == '\0') {
>> ^
>> kernel/debug/gdbstub.c:1036:3: note: here
>> case 'C': /* Exception passing */
>> ^~~~
>> kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> if (tmp == 0)
>> ^
>> kernel/debug/gdbstub.c:1043:3: note: here
>> case 'c': /* Continue packet */
>> ^~~~
>> kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
>> dbg_activate_sw_breakpoints();
>> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
>> kernel/debug/gdbstub.c:1052:3: note: here
>> default:
>> ^~~~~~~
>>
>> Warning level 3 was used: -Wimplicit-fallthrough=3
>>
>> Notice that, in this particular case, the code comment is modified
>> in accordance with what GCC is expecting to find.
>>
>> This patch is part of the ongoing efforts to enable
>> -Wimplicit-fallthrough.
>>
>> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
>> ---
>> kernel/debug/gdbstub.c | 5 +++--
>> 1 file changed, 3 insertions(+), 2 deletions(-)
>>
>> diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
>> index 7510dc687c0d..9f267b8905b4 100644
>> --- a/kernel/debug/gdbstub.c
>> +++ b/kernel/debug/gdbstub.c
>> @@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
>> return DBG_PASS_EVENT;
>> }
>> #endif
>> + /* Fall through */
>> case 'C': /* Exception passing */
>> tmp = gdb_cmd_exception_pass(ks);
>> if (tmp > 0)
>> goto default_handle;
>> if (tmp == 0)
>> break;
>> - /* Fall through on tmp < 0 */
>> + /* Fall through - on tmp < 0 */
>> case 'c': /* Continue packet */
>> case 's': /* Single step packet */
>> if (kgdb_contthread && kgdb_contthread != current) {
>> @@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
>> break;
>> }
>> dbg_activate_sw_breakpoints();
>> - /* Fall through to default processing */
>> + /* Fall through - to default processing */
>> default:
>> default_handle:
>> error = kgdb_arch_handle_exception(ks->ex_vector,
>>
>
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] gdbstub: mark expected switch fall-throughs
2019-04-01 19:57 ` Gustavo A. R. Silva
@ 2019-04-04 10:12 ` Daniel Thompson
2019-04-04 16:02 ` Gustavo A. R. Silva
0 siblings, 1 reply; 6+ messages in thread
From: Daniel Thompson @ 2019-04-04 10:12 UTC (permalink / raw)
To: Gustavo A. R. Silva; +Cc: Jason Wessel, kgdb-bugreport, linux-kernel, Kees Cook
On Mon, Apr 01, 2019 at 02:57:36PM -0500, Gustavo A. R. Silva wrote:
>
>
> On 2/26/19 2:47 PM, Jason Wessel wrote:
> > We'll have to fix them at some point.
> >
> > Acked-by: Jason Wessel <jason.wessel@windriver.com>
> >
>
> Thank you, Jason.
>
> Friendly ping:
>
> Who can take this?
I happy to put it in my tree (probably next week).
Daniel.
>
> Thanks
> --
> Gustavo
>
> >
> > Cheers,
> > Jason.
> >
> > On 2/26/19 1:16 PM, Gustavo A. R. Silva wrote:
> >> In preparation to enabling -Wimplicit-fallthrough, mark switch
> >> cases where we are expecting to fall through.
> >>
> >> This patch fixes the following warnings:
> >>
> >> kernel/debug/gdbstub.c: In function ‘gdb_serial_stub’:
> >> kernel/debug/gdbstub.c:1031:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >> if (remcom_in_buffer[1] == '\0') {
> >> ^
> >> kernel/debug/gdbstub.c:1036:3: note: here
> >> case 'C': /* Exception passing */
> >> ^~~~
> >> kernel/debug/gdbstub.c:1040:7: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >> if (tmp == 0)
> >> ^
> >> kernel/debug/gdbstub.c:1043:3: note: here
> >> case 'c': /* Continue packet */
> >> ^~~~
> >> kernel/debug/gdbstub.c:1050:4: warning: this statement may fall through [-Wimplicit-fallthrough=]
> >> dbg_activate_sw_breakpoints();
> >> ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> >> kernel/debug/gdbstub.c:1052:3: note: here
> >> default:
> >> ^~~~~~~
> >>
> >> Warning level 3 was used: -Wimplicit-fallthrough=3
> >>
> >> Notice that, in this particular case, the code comment is modified
> >> in accordance with what GCC is expecting to find.
> >>
> >> This patch is part of the ongoing efforts to enable
> >> -Wimplicit-fallthrough.
> >>
> >> Signed-off-by: Gustavo A. R. Silva <gustavo@embeddedor.com>
> >> ---
> >> kernel/debug/gdbstub.c | 5 +++--
> >> 1 file changed, 3 insertions(+), 2 deletions(-)
> >>
> >> diff --git a/kernel/debug/gdbstub.c b/kernel/debug/gdbstub.c
> >> index 7510dc687c0d..9f267b8905b4 100644
> >> --- a/kernel/debug/gdbstub.c
> >> +++ b/kernel/debug/gdbstub.c
> >> @@ -1033,13 +1033,14 @@ int gdb_serial_stub(struct kgdb_state *ks)
> >> return DBG_PASS_EVENT;
> >> }
> >> #endif
> >> + /* Fall through */
> >> case 'C': /* Exception passing */
> >> tmp = gdb_cmd_exception_pass(ks);
> >> if (tmp > 0)
> >> goto default_handle;
> >> if (tmp == 0)
> >> break;
> >> - /* Fall through on tmp < 0 */
> >> + /* Fall through - on tmp < 0 */
> >> case 'c': /* Continue packet */
> >> case 's': /* Single step packet */
> >> if (kgdb_contthread && kgdb_contthread != current) {
> >> @@ -1048,7 +1049,7 @@ int gdb_serial_stub(struct kgdb_state *ks)
> >> break;
> >> }
> >> dbg_activate_sw_breakpoints();
> >> - /* Fall through to default processing */
> >> + /* Fall through - to default processing */
> >> default:
> >> default_handle:
> >> error = kgdb_arch_handle_exception(ks->ex_vector,
> >>
> >
^ permalink raw reply [flat|nested] 6+ messages in thread* Re: [PATCH] gdbstub: mark expected switch fall-throughs
2019-04-04 10:12 ` Daniel Thompson
@ 2019-04-04 16:02 ` Gustavo A. R. Silva
0 siblings, 0 replies; 6+ messages in thread
From: Gustavo A. R. Silva @ 2019-04-04 16:02 UTC (permalink / raw)
To: Daniel Thompson; +Cc: Jason Wessel, kgdb-bugreport, linux-kernel, Kees Cook
On 4/4/19 5:12 AM, Daniel Thompson wrote:
> On Mon, Apr 01, 2019 at 02:57:36PM -0500, Gustavo A. R. Silva wrote:
>>
>>
>> On 2/26/19 2:47 PM, Jason Wessel wrote:
>>> We'll have to fix them at some point.
>>>
>>> Acked-by: Jason Wessel <jason.wessel@windriver.com>
>>>
>>
>> Thank you, Jason.
>>
>> Friendly ping:
>>
>> Who can take this?
>
> I happy to put it in my tree (probably next week).
>
Awesome. :)
Thanks, Daniel.
--
Gustavo
^ permalink raw reply [flat|nested] 6+ messages in thread
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2019-02-26 19:16 [PATCH] gdbstub: mark expected switch fall-throughs Gustavo A. R. Silva
2019-02-26 20:47 ` Jason Wessel
2019-02-26 20:59 ` Gustavo A. R. Silva
2019-04-01 19:57 ` Gustavo A. R. Silva
2019-04-04 10:12 ` Daniel Thompson
2019-04-04 16:02 ` Gustavo A. R. Silva
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