This is a note to let you know that I've just added the patch titled powerpc/cell: Fix clang -Wimplicit-fallthrough warning to the 5.4-stable tree which can be found at: http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary The filename of the patch is: powerpc-cell-fix-clang-wimplicit-fallthrough-warning.patch and it can be found in the queue-5.4 subdirectory. If you, or anyone else, feels it should not be added to the stable tree, please let <stable@xxxxxxxxxxxxxxx> know about it. >From e89257e28e844f5d1d39081bb901d9f1183a7705 Mon Sep 17 00:00:00 2001 From: Anders Roxell <anders.roxell@xxxxxxxxxx> Date: Tue, 7 Dec 2021 12:02:28 +0100 Subject: powerpc/cell: Fix clang -Wimplicit-fallthrough warning From: Anders Roxell <anders.roxell@xxxxxxxxxx> commit e89257e28e844f5d1d39081bb901d9f1183a7705 upstream. Clang warns: arch/powerpc/platforms/cell/pervasive.c:81:2: error: unannotated fall-through between switch labels 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@xxxxxxxxxx> Signed-off-by: Anders Roxell <anders.roxell@xxxxxxxxxx> Reviewed-by: Nathan Chancellor <nathan@xxxxxxxxxx> Reviewed-by: Arnd Bergmann <arnd@xxxxxxxx> Signed-off-by: Michael Ellerman <mpe@xxxxxxxxxxxxxx> Link: https://lore.kernel.org/r/20211207110228.698956-1-anders.roxell@xxxxxxxxxx Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx> --- arch/powerpc/platforms/cell/pervasive.c | 1 + 1 file changed, 1 insertion(+) --- a/arch/powerpc/platforms/cell/pervasive.c +++ b/arch/powerpc/platforms/cell/pervasive.c @@ -77,6 +77,7 @@ static int cbe_system_reset_exception(st 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 Patches currently in stable-queue which might be from anders.roxell@xxxxxxxxxx are queue-5.4/powerpc-cell-fix-clang-wimplicit-fallthrough-warning.patch