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| author |   Michal Orzel <michal.orzel@arm.com> | 2022-04-26 09:06:03 +0200 |
|---|---|---|
| committer |   Catalin Marinas <catalin.marinas@arm.com> | 2022-05-04 11:52:15 +0100 |
| commit | 48e6f22e25a44e43952db5fbb767dea0c9319cb2 (patch) | |
| tree | 1d45f3e2135bb1574c338925e31ee0382e469a92 | |
| parent | arm64: document the boot requirements for MTE (diff) | |
| download | linux-dev-48e6f22e25a44e43952db5fbb767dea0c9319cb2.tar.xz linux-dev-48e6f22e25a44e43952db5fbb767dea0c9319cb2.zip | |
arm64: cputype: Avoid overflow using MIDR_IMPLEMENTOR_MASK
Value of macro MIDR_IMPLEMENTOR_MASK exceeds the range of integer
and can lead to overflow. Currently there is no issue as it is used
in expressions implicitly casting it to u32. To avoid possible
problems, fix the macro.
Signed-off-by: Michal Orzel <michal.orzel@arm.com>
Link: https://lore.kernel.org/r/20220426070603.56031-1-michal.orzel@arm.com
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
| -rw-r--r-- | arch/arm64/include/asm/cputype.h | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/arm64/include/asm/cputype.h b/arch/arm64/include/asm/cputype.h index ff8f4511df71..92331c07c2d1 100644 --- a/arch/arm64/include/asm/cputype.h +++ b/arch/arm64/include/asm/cputype.h @@ -36,7 +36,7 @@ #define MIDR_VARIANT(midr) \ (((midr) & MIDR_VARIANT_MASK) >> MIDR_VARIANT_SHIFT) #define MIDR_IMPLEMENTOR_SHIFT 24 -#define MIDR_IMPLEMENTOR_MASK (0xff << MIDR_IMPLEMENTOR_SHIFT) +#define MIDR_IMPLEMENTOR_MASK (0xffU << MIDR_IMPLEMENTOR_SHIFT) #define MIDR_IMPLEMENTOR(midr) \ (((midr) & MIDR_IMPLEMENTOR_MASK) >> MIDR_IMPLEMENTOR_SHIFT) |