diff options
| author | Will Deacon <will@kernel.org> | 2019-08-05 18:13:08 +0100 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2019-08-11 12:20:42 +0200 |
| commit | ebb9ffd10a3849d8d87ad311921462dea3a582ec (patch) | |
| tree | 4a6e8f0ec84f1596bd3ad437bd1dc5547c6e1c1a /net/ipv4/tcp_output.c | |
| parent | 375dddef573abace1fd1449bf471e47975235c71 (diff) | |
arm64: cpufeature: Fix feature comparison for CTR_EL0.{CWG,ERG}
commit 147b9635e6347104b91f48ca9dca61eb0fbf2a54 upstream.
If CTR_EL0.{CWG,ERG} are 0b0000 then they must be interpreted to have
their architecturally maximum values, which defeats the use of
FTR_HIGHER_SAFE when sanitising CPU ID registers on heterogeneous
machines.
Introduce FTR_HIGHER_OR_ZERO_SAFE so that these fields effectively
saturate at zero.
Fixes: 3c739b571084 ("arm64: Keep track of CPU feature registers")
Cc: <stable@vger.kernel.org> # 4.4.y only
Reviewed-by: Suzuki K Poulose <suzuki.poulose@arm.com>
Acked-by: Mark Rutland <mark.rutland@arm.com>
Signed-off-by: Will Deacon <will@kernel.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'net/ipv4/tcp_output.c')
0 files changed, 0 insertions, 0 deletions