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MIPS: Avoid magic numbers probing kscratch_mask

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The decode_config4() function reads kscratch_mask from
CP0_Config4.KScrExist using a hard coded shift and mask. We already have
a definition for the mask in mipsregs.h, so add a definition for the
shift and make use of them.

Signed-off-by: James Hogan <james.hogan@imgtec.com>
Cc: linux-mips@linux-mips.org
Patchwork: https://patchwork.linux-mips.org/patch/13227/
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
This commit is contained in:
James Hogan
2016-05-11 15:50:27 +01:00
committed by Ralf Baechle
parent 30228c40f0
commit 9e575f7535
2 changed files with 4 additions and 2 deletions
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3
arch/mips/kernel/cpu-probe.c
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@@ -801,7 +801,8 @@ static inline unsigned int decode_config4(struct cpuinfo_mips *c)
}
}
c->kscratch_mask = (config4 >> 16) & 0xff;
c->kscratch_mask = (config4 & MIPS_CONF4_KSCREXIST)
>> MIPS_CONF4_KSCREXIST_SHIFT;
asid_mask = MIPS_ENTRYHI_ASID;
if (config4 & MIPS_CONF4_AE)