From d175ed2bd6544474dcc99d74f8155c2ba44e8db2 Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Thu, 11 Sep 2014 08:30:19 +0100 Subject: [PATCH] MIPS: Ensure Config5.UFE is clear on boot As is done for UFR, ensure that userland cannot directly manipulate the mode by clearing the UFE bit during boot. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Cc: Alexander Viro Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7677/ Signed-off-by: Ralf Baechle --- arch/mips/kernel/cpu-probe.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/mips/kernel/cpu-probe.c b/arch/mips/kernel/cpu-probe.c index d76f189291bc..d68ad96392f8 100644 --- a/arch/mips/kernel/cpu-probe.c +++ b/arch/mips/kernel/cpu-probe.c @@ -461,7 +461,7 @@ static inline unsigned int decode_config5(struct cpuinfo_mips *c) unsigned int config5; config5 = read_c0_config5(); - config5 &= ~MIPS_CONF5_UFR; + config5 &= ~(MIPS_CONF5_UFR | MIPS_CONF5_UFE); write_c0_config5(config5); if (config5 & MIPS_CONF5_EVA) -- 2.20.1