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ARM: 8563/1: fix demoting HWCAP_SWP

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Commit b8c9592 "ARM: 8318/1: treat CPU feature register fields as signed
quantities" accidentally altered cpuid register used to demote
HWCAP_SWP.
ARM ARM says that SyncPrim_instrs bits in ID_ISAR3 should be used with
SynchPrim_instrs_frac from ID_ISAR4. So, follow this rule.

Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Acked-by: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
This commit is contained in:
Vladimir Murzin 2016-04-19 12:35:20 +01:00 committed by Russell King
parent 9c18fcf7ae
commit 03f1217e5f
1 changed files with 1 additions and 1 deletions
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2
arch/arm/kernel/setup.c
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@ -512,7 +512,7 @@ static void __init elf_hwcap_fixup(void)
*/
if (cpuid_feature_extract(CPUID_EXT_ISAR3, 12) > 1 ||
(cpuid_feature_extract(CPUID_EXT_ISAR3, 12) == 1 &&
cpuid_feature_extract(CPUID_EXT_ISAR3, 20) >= 3))
cpuid_feature_extract(CPUID_EXT_ISAR4, 20) >= 3))
elf_hwcap &= ~HWCAP_SWP;
}