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SubjectRe: [PATCH v3 1/3] kasan: define and use MAX_PTRS_PER_* for early shadow tables

On 13/12/19 2:16 am, Daniel Axtens wrote:
> powerpc has a variable number of PTRS_PER_*, set at runtime based
> on the MMU that the kernel is booted under.
> This means the PTRS_PER_* are no longer constants, and therefore
> breaks the build.
> Define default MAX_PTRS_PER_*s in the same style as MAX_PTRS_PER_P4D.
> As KASAN is the only user at the moment, just define them in the kasan
> header, and have them default to PTRS_PER_* unless overridden in arch
> code.
> Suggested-by: Christophe Leroy <>
> Suggested-by: Balbir Singh <>
> Signed-off-by: Daniel Axtens <>
> ---
Reviewed-by: Balbir Singh <>


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