Messages in this thread Patch in this message | | | From | Andrey Konovalov <> | Subject | [PATCH] kasan, arm64: clean up KASAN_SHADOW_SCALE_SHIFT usage | Date | Thu, 1 Mar 2018 18:07:12 +0100 |
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This is a follow up patch to the series I sent recently that cleans up KASAN_SHADOW_SCALE_SHIFT usage (which value was hardcoded and scattered all over the code). This fixes the one place that I forgot to fix.
The change is purely aesthetical, instead of hardcoding the value for KASAN_SHADOW_SCALE_SHIFT in arch/arm64/Makefile, an appropriate variable is declared and used.
Signed-off-by: Andrey Konovalov <andreyknvl@google.com> --- arch/arm64/Makefile | 10 ++++++---- 1 file changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/arm64/Makefile b/arch/arm64/Makefile index b481b4a7c011..4bb18aee4846 100644 --- a/arch/arm64/Makefile +++ b/arch/arm64/Makefile @@ -97,12 +97,14 @@ else TEXT_OFFSET := 0x00080000 endif -# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - 3)) - (1 << 61) +# KASAN_SHADOW_OFFSET = VA_START + (1 << (VA_BITS - KASAN_SHADOW_SCALE_SHIFT)) +# - (1 << (64 - KASAN_SHADOW_SCALE_SHIFT)) # in 32-bit arithmetic +KASAN_SHADOW_SCALE_SHIFT := 3 KASAN_SHADOW_OFFSET := $(shell printf "0x%08x00000000\n" $$(( \ - (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ - + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - 3)) \ - - (1 << (64 - 32 - 3)) )) ) + (0xffffffff & (-1 << ($(CONFIG_ARM64_VA_BITS) - 32))) \ + + (1 << ($(CONFIG_ARM64_VA_BITS) - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) \ + - (1 << (64 - 32 - $(KASAN_SHADOW_SCALE_SHIFT))) )) ) export TEXT_OFFSET GZFLAGS -- 2.16.2.395.g2e18187dfd-goog
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