powerpc/mm: Fix build error with FLATMEM book3s64 config

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The current value of MAX_PHYSMEM_BITS cannot work with 32 bit configs.
We used to have MAX_PHYSMEM_BITS not defined without SPARSEMEM and 32
bit configs never expected a value to be set for MAX_PHYSMEM_BITS.

Dependent code such as zsmalloc derived the right values based on other
fields. Instead of finding a value that works with different configs,
use new values only for book3s_64. For 64 bit booke, use the definition
of MAX_PHYSMEM_BITS as per commit a7df61a0e2 ("[PATCH] ppc64: Increase sparsemem defaults")
That change was done in 2005 and hopefully will work with book3e 64.

Fixes: 8bc0868998 ("powerpc/mm: Only define MAX_PHYSMEM_BITS in SPARSEMEM configurations")
Signed-off-by: Aneesh Kumar K.V <aneesh.kumar@linux.ibm.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

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Aneesh Kumar K.V 2019-04-03 11:35:14 +05:30 • committed by Michael Ellerman

parent a68c31fc01

commit 6161a37307

3 changed files with 17 additions and 15 deletions

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15

arch/powerpc/include/asm/book3s/64/mmu.h

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15

arch/powerpc/include/asm/mmu.h

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2

arch/powerpc/include/asm/nohash/64/mmu.h

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