* [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
@ 2021-12-07 11:02 Anders Roxell
2021-12-07 13:00 ` Arnd Bergmann
` (3 more replies)
0 siblings, 4 replies; 5+ messages in thread
From: Anders Roxell @ 2021-12-07 11:02 UTC (permalink / raw)
To: arnd
Cc: nathan, ndesaulniers, linuxppc-dev, linux-kernel, llvm,
Anders Roxell, Naresh Kamboju
Clang warns:
arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
case SRR1_WAKEEE:
^
arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through
case SRR1_WAKEEE:
^
break;
1 error generated.
Clang is more pedantic than GCC, which does not warn when failing
through to a case that is just break or return. Clang's version
is more in line with the kernel's own stance in deprecated.rst.
Add athe missing break to silence the warning.
Fixes: 6e83985b0f6e ("powerpc/cbe: Do not process external or decremeter interrupts from sreset")
Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
---
arch/powerpc/platforms/cell/pervasive.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
index 5b9a7e9f144b..dff8d5e7ab82 100644
--- a/arch/powerpc/platforms/cell/pervasive.c
+++ b/arch/powerpc/platforms/cell/pervasive.c
@@ -78,6 +78,7 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
switch (regs->msr & SRR1_WAKEMASK) {
case SRR1_WAKEDEC:
set_dec(1);
+ break;
case SRR1_WAKEEE:
/*
* Handle these when interrupts get re-enabled and we take
--
2.33.0
^ permalink raw reply related [flat|nested] 5+ messages in thread
* Re: [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
2021-12-07 11:02 [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough Anders Roxell
@ 2021-12-07 13:00 ` Arnd Bergmann
2021-12-07 16:27 ` Nathan Chancellor
` (2 subsequent siblings)
3 siblings, 0 replies; 5+ messages in thread
From: Arnd Bergmann @ 2021-12-07 13:00 UTC (permalink / raw)
To: Anders Roxell
Cc: Arnd Bergmann, Nathan Chancellor, Nick Desaulniers, linuxppc-dev,
Linux Kernel Mailing List, llvm, Naresh Kamboju
On Tue, Dec 7, 2021 at 12:02 PM Anders Roxell <anders.roxell@linaro.org> wrote:
>
> Clang warns:
>
> arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
> case SRR1_WAKEEE:
> ^
> arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through
> case SRR1_WAKEEE:
> ^
> break;
> 1 error generated.
>
> Clang is more pedantic than GCC, which does not warn when failing
> through to a case that is just break or return. Clang's version
> is more in line with the kernel's own stance in deprecated.rst.
> Add athe missing break to silence the warning.
>
> Fixes: 6e83985b0f6e ("powerpc/cbe: Do not process external or decremeter interrupts from sreset")
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Thanks for the fix!
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
2021-12-07 11:02 [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough Anders Roxell
2021-12-07 13:00 ` Arnd Bergmann
@ 2021-12-07 16:27 ` Nathan Chancellor
2021-12-09 6:40 ` Michael Ellerman
2021-12-15 0:24 ` Michael Ellerman
3 siblings, 0 replies; 5+ messages in thread
From: Nathan Chancellor @ 2021-12-07 16:27 UTC (permalink / raw)
To: Anders Roxell
Cc: arnd, ndesaulniers, linuxppc-dev, linux-kernel, llvm, Naresh Kamboju
On Tue, Dec 07, 2021 at 12:02:28PM +0100, Anders Roxell wrote:
> Clang warns:
>
> arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
> case SRR1_WAKEEE:
> ^
> arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through
> case SRR1_WAKEEE:
> ^
> break;
> 1 error generated.
>
> Clang is more pedantic than GCC, which does not warn when failing
> through to a case that is just break or return. Clang's version
> is more in line with the kernel's own stance in deprecated.rst.
> Add athe missing break to silence the warning.
^ small typo, probably not worth a resend
>
> Fixes: 6e83985b0f6e ("powerpc/cbe: Do not process external or decremeter interrupts from sreset")
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> arch/powerpc/platforms/cell/pervasive.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
> index 5b9a7e9f144b..dff8d5e7ab82 100644
> --- a/arch/powerpc/platforms/cell/pervasive.c
> +++ b/arch/powerpc/platforms/cell/pervasive.c
> @@ -78,6 +78,7 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
> switch (regs->msr & SRR1_WAKEMASK) {
> case SRR1_WAKEDEC:
> set_dec(1);
> + break;
> case SRR1_WAKEEE:
> /*
> * Handle these when interrupts get re-enabled and we take
> --
> 2.33.0
>
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
2021-12-07 11:02 [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough Anders Roxell
2021-12-07 13:00 ` Arnd Bergmann
2021-12-07 16:27 ` Nathan Chancellor
@ 2021-12-09 6:40 ` Michael Ellerman
2021-12-15 0:24 ` Michael Ellerman
3 siblings, 0 replies; 5+ messages in thread
From: Michael Ellerman @ 2021-12-09 6:40 UTC (permalink / raw)
To: Anders Roxell, arnd
Cc: nathan, ndesaulniers, linuxppc-dev, linux-kernel, llvm,
Anders Roxell, Naresh Kamboju
Anders Roxell <anders.roxell@linaro.org> writes:
> Clang warns:
>
> arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
> case SRR1_WAKEEE:
> ^
> arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through
> case SRR1_WAKEEE:
> ^
> break;
> 1 error generated.
>
> Clang is more pedantic than GCC, which does not warn when failing
> through to a case that is just break or return. Clang's version
> is more in line with the kernel's own stance in deprecated.rst.
> Add athe missing break to silence the warning.
>
> Fixes: 6e83985b0f6e ("powerpc/cbe: Do not process external or decremeter interrupts from sreset")
> Reported-by: Naresh Kamboju <naresh.kamboju@linaro.org>
> Signed-off-by: Anders Roxell <anders.roxell@linaro.org>
> ---
> arch/powerpc/platforms/cell/pervasive.c | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/powerpc/platforms/cell/pervasive.c b/arch/powerpc/platforms/cell/pervasive.c
> index 5b9a7e9f144b..dff8d5e7ab82 100644
> --- a/arch/powerpc/platforms/cell/pervasive.c
> +++ b/arch/powerpc/platforms/cell/pervasive.c
> @@ -78,6 +78,7 @@ static int cbe_system_reset_exception(struct pt_regs *regs)
> switch (regs->msr & SRR1_WAKEMASK) {
> case SRR1_WAKEDEC:
> set_dec(1);
> + break;
> case SRR1_WAKEEE:
> /*
> * Handle these when interrupts get re-enabled and we take
Thanks. I have definitely fixed this somewhere before, but I guess I
never sent it upstream, or it's still lying in a git stash of mine.
cheers
^ permalink raw reply [flat|nested] 5+ messages in thread
* Re: [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
2021-12-07 11:02 [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough Anders Roxell
` (2 preceding siblings ...)
2021-12-09 6:40 ` Michael Ellerman
@ 2021-12-15 0:24 ` Michael Ellerman
3 siblings, 0 replies; 5+ messages in thread
From: Michael Ellerman @ 2021-12-15 0:24 UTC (permalink / raw)
To: arnd, Anders Roxell
Cc: ndesaulniers, nathan, Naresh Kamboju, linux-kernel, linuxppc-dev, llvm
On Tue, 7 Dec 2021 12:02:28 +0100, Anders Roxell wrote:
> Clang warns:
>
> arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels [-Werror,-Wimplicit-fallthrough]
> case SRR1_WAKEEE:
> ^
> arch/powerpc/platforms/cell/pervasive.c:81:2: note: insert 'break;' to avoid fall-through
> case SRR1_WAKEEE:
> ^
> break;
> 1 error generated.
>
> [...]
Applied to powerpc/next.
[1/1] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough
https://git.kernel.org/powerpc/c/e89257e28e844f5d1d39081bb901d9f1183a7705
cheers
^ permalink raw reply [flat|nested] 5+ messages in thread
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2021-12-07 11:02 [PATCH] powerpc: platforms: cell: pervasive: fix clang -Wimplicit-fallthrough Anders Roxell
2021-12-07 13:00 ` Arnd Bergmann
2021-12-07 16:27 ` Nathan Chancellor
2021-12-09 6:40 ` Michael Ellerman
2021-12-15 0:24 ` Michael Ellerman
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