From 0dfffa5479d6260d04d021f69203b1926f73d889 Mon Sep 17 00:00:00 2001 From: Brian Masney Date: Tue, 20 Jan 2026 12:07:23 -0500 Subject: [PATCH] openrisc: define arch-specific version of nop() When compiling a driver written for MIPS on OpenRISC that uses the nop() function, it fails due to the following error: drivers/watchdog/pic32-wdt.c: Assembler messages: drivers/watchdog/pic32-wdt.c:125: Error: unrecognized instruction `nop' The driver currently uses the generic version of nop() from include/asm-generic/barrier.h: #ifndef nop #define nop() asm volatile ("nop") #endif Let's fix this on OpenRISC by defining an architecture-specific version of nop(). This was tested by performing an allmodconfig openrisc cross compile on an aarch64 host. Reported-by: kernel test robot Closes: https://lore.kernel.org/oe-kbuild-all/202601180236.BVy480We-lkp@intel.com/ Signed-off-by: Brian Masney Signed-off-by: Stafford Horne --- arch/openrisc/include/asm/barrier.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/openrisc/include/asm/barrier.h b/arch/openrisc/include/asm/barrier.h index 7538294721bed..8e592c9909023 100644 --- a/arch/openrisc/include/asm/barrier.h +++ b/arch/openrisc/include/asm/barrier.h @@ -4,6 +4,8 @@ #define mb() asm volatile ("l.msync" ::: "memory") +#define nop() asm volatile ("l.nop") + #include #endif /* __ASM_BARRIER_H */ -- 2.47.3