lkml.org 
[lkml]   [2019]   [Feb]   [26]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
SubjectRe: [PATCH] gdbstub: mark expected switch fall-throughs
From
Date
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,
>

\
 
 \ /
  Last update: 2019-02-26 21:48    [W:3.769 / U:0.008 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site