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Date: Mon, 26 Oct 2020 19:46:40 -0400 From: Sasha Levin <sashal@...nel.org> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org Cc: Oliver O'Halloran <oohall@...il.com>, Joel Stanley <joel@....id.au>, Michael Ellerman <mpe@...erman.id.au>, Sasha Levin <sashal@...nel.org>, linuxppc-dev@...ts.ozlabs.org Subject: [PATCH AUTOSEL 5.9 002/147] powerpc/powernv/smp: Fix spurious DBG() warning From: Oliver O'Halloran <oohall@...il.com> [ Upstream commit f6bac19cf65c5be21d14a0c9684c8f560f2096dd ] When building with W=1 we get the following warning: arch/powerpc/platforms/powernv/smp.c: In function ‘pnv_smp_cpu_kill_self’: arch/powerpc/platforms/powernv/smp.c:276:16: error: suggest braces around empty body in an ‘if’ statement [-Werror=empty-body] 276 | cpu, srr1); | ^ cc1: all warnings being treated as errors The full context is this block: if (srr1 && !generic_check_cpu_restart(cpu)) DBG("CPU%d Unexpected exit while offline srr1=%lx!\n", cpu, srr1); When building with DEBUG undefined DBG() expands to nothing and GCC emits the warning due to the lack of braces around an empty statement. Signed-off-by: Oliver O'Halloran <oohall@...il.com> Reviewed-by: Joel Stanley <joel@....id.au> Signed-off-by: Michael Ellerman <mpe@...erman.id.au> Link: https://lore.kernel.org/r/20200804005410.146094-2-oohall@gmail.com Signed-off-by: Sasha Levin <sashal@...nel.org> --- arch/powerpc/platforms/powernv/smp.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/powerpc/platforms/powernv/smp.c b/arch/powerpc/platforms/powernv/smp.c index b2ba3e95bda73..bbf361f23ae86 100644 --- a/arch/powerpc/platforms/powernv/smp.c +++ b/arch/powerpc/platforms/powernv/smp.c @@ -43,7 +43,7 @@ #include <asm/udbg.h> #define DBG(fmt...) udbg_printf(fmt) #else -#define DBG(fmt...) +#define DBG(fmt...) do { } while (0) #endif static void pnv_smp_setup_cpu(int cpu) -- 2.25.1
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