From: Russell King Date: Fri, 26 Aug 2011 23:37:38 +0000 (+0100) Subject: ARM: pm: some ARMv7 requires a dsb in resume to ensure correctness X-Git-Tag: firefly_0821_release~3680^2~4538^2~1 X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=f35235a315a167e38e8e5bc9e476dcd7c932612c;p=firefly-linux-kernel-4.4.55.git ARM: pm: some ARMv7 requires a dsb in resume to ensure correctness Add a dsb after the isb to ensure that the previous writes to the CP15 registers take effect before we enable the MMU. Signed-off-by: Russell King --- diff --git a/arch/arm/mm/proc-v7.S b/arch/arm/mm/proc-v7.S index dec72ee9f7af..a773f4e2869c 100644 --- a/arch/arm/mm/proc-v7.S +++ b/arch/arm/mm/proc-v7.S @@ -255,6 +255,7 @@ ENTRY(cpu_v7_do_resume) mcr p15, 0, r4, c10, c2, 0 @ write PRRR mcr p15, 0, r5, c10, c2, 1 @ write NMRR isb + dsb mov r0, r9 @ control register mov r2, r7, lsr #14 @ get TTB0 base mov r2, r2, lsl #14