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Date: Wed, 6 Jan 2021 08:47:39 +0800 From: Jinyang He <hejinyang@...ngson.cn> To: Thomas Bogendoerfer <tsbogend@...ha.franken.de>, Jiaxun Yang <jiaxun.yang@...goat.com> Cc: linux-mips@...r.kernel.org, linux-kernel@...r.kernel.org Subject: [PATCH] MIPS: zboot: Avoid endless loop in clear BSS. Commit 2ee1503e546f ("MIPS: zboot: head.S clean up"). After .noreorder removed, clear BSS fall into endless loop. The bne instruction will add nop to the delay slot at compile time. So a0 register will not increment by 4. Fix it and clear BSS from _edata to (_end - 1). Signed-off-by: Jinyang He <hejinyang@...ngson.cn> --- arch/mips/boot/compressed/head.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/boot/compressed/head.S b/arch/mips/boot/compressed/head.S index 070b2fb..5795d0a 100644 --- a/arch/mips/boot/compressed/head.S +++ b/arch/mips/boot/compressed/head.S @@ -26,8 +26,8 @@ PTR_LA a0, _edata PTR_LA a2, _end 1: sw zero, 0(a0) + addiu a0, a0, 4 bne a2, a0, 1b - addiu a0, a0, 4 PTR_LA a0, (.heap) /* heap address */ PTR_LA sp, (.stack + 8192) /* stack address */ -- 2.1.0
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