[PATCH] Fix smp_on_up detection
From: tony@atomide.com (Tony Lindgren)
Date: 2010-09-03 00:51:42
Subsystem:
arm port, the rest · Maintainers:
Russell King, Linus Torvalds
This is needed to detect UP properly on older ARMv7 like Cortex-A8. Signed-off-by: Tony Lindgren <tony@atomide.com>
diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S
index 0b4a626..86aa36d 100644
--- a/arch/arm/kernel/head.S
+++ b/arch/arm/kernel/head.S@@ -346,8 +346,8 @@ __fixup_smp: bne smp_on_up @ no, assume UP mrc p15, 0, r0, c0, c0, 5 @ read MIDR movs r0, r0, lsr #30 - teqne r0, #3 @ check top two bits 00 or 11 - movne pc, lr + teq r0, #2 @ check top two bits, 10 for SMP + moveq pc, lr smp_on_up: adr r0, 1f --CNK/L7dwKXQ4Ub8J--