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Date: Wed, 2 Dec 2020 11:00:05 +0800 From: Jinyang He <hejinyang@...ngson.cn> To: Thomas Bogendoerfer <tsbogend@...ha.franken.de> Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] MIPS: KASLR: Fix sync_icache() trapped in loop when synci_step is zero Reading synci_step by using rdhwr instruction may return zero if no cache need be synchronized. On the one hand, to make sure all load operation and store operation finished we do __sync() for every platform. On the other hand, some platform need operate synci one time although step is zero. Signed-off-by: Jinyang He <hejinyang@...ngson.cn> --- arch/mips/kernel/relocate.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/relocate.c b/arch/mips/kernel/relocate.c index 57bdd276..47aeb33 100644 --- a/arch/mips/kernel/relocate.c +++ b/arch/mips/kernel/relocate.c @@ -64,7 +64,7 @@ static void __init sync_icache(void *kbase, unsigned long kernel_length) : "r" (kbase)); kbase += step; - } while (kbase < kend); + } while (step && kbase < kend); /* Completion barrier */ __sync(); -- 2.1.0
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