| commit | 730a8128cd8978467eb1cf546b11014acb57d433 | |
| author | Will Deacon <will.deacon@arm.com> | |
| Fri, 10 Aug 2012 18:13:36 +0000 (10 19:13 +0100) | ||
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | |
| Sat, 11 Aug 2012 08:16:00 +0000 (11 09:16 +0100) | ||
| tree | 010d027425130eb77c868c69365d6b0eb1c5a604 | treesnapshot (tar.gz zip) |
| parent | f5f2025ef3e2cdb593707cbf87378761f17befbe | commitdiff |
ARM: 7489/1: errata: fix workaround for erratum #720789 on UP systems
Commit 5a783cbc4836 ("ARM: 7478/1: errata: extend workaround for erratum
#720789") added workarounds for erratum #720789 to the range TLB
invalidation functions with the observation that the erratum only
affects SMP platforms. However, when running an SMP_ON_UP kernel on a
uniprocessor platform we must take care to preserve the ASID as the
workaround is not required.
This patch ensures that we don't set the ASID to 0 when flushing the TLB
on such a system, preserving the original behaviour with the workaround
disabled.
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Commit 5a783cbc4836 ("ARM: 7478/1: errata: extend workaround for erratum
#720789") added workarounds for erratum #720789 to the range TLB
invalidation functions with the observation that the erratum only
affects SMP platforms. However, when running an SMP_ON_UP kernel on a
uniprocessor platform we must take care to preserve the ASID as the
workaround is not required.
This patch ensures that we don't set the ASID to 0 when flushing the TLB
on such a system, preserving the original behaviour with the workaround
disabled.
Cc: <stable@vger.kernel.org>
Signed-off-by: Will Deacon <will.deacon@arm.com>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
| arch/arm/mm/tlb-v7.S | diffblobblamehistory |