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powerpc: Define/use HUGETLB_NEED_PRELOAD insead of complicated #if

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Define HUGETLB_NEED_PRELOAD in mmu-book3e.h for CONFIG_PPC64 instead
of having a much more complicated #if block.  This is easier to read
and maintain.

Signed-off-by: Becky Bruce <beckyb@kernel.crashing.org>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
This commit is contained in:
Becky Bruce 2011-11-29 15:10:39 +00:00 committed by Benjamin Herrenschmidt
parent d93e4d7d72
commit 1f6820b4c1
2 changed files with 8 additions and 2 deletions
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3
arch/powerpc/include/asm/hugetlb.h
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@ -124,8 +124,7 @@ static inline int huge_ptep_set_access_flags(struct vm_area_struct *vma,
unsigned long addr, pte_t *ptep,
pte_t pte, int dirty)
{
#if defined(CONFIG_PPC_MMU_NOHASH) && \
!(defined(CONFIG_PPC_FSL_BOOK3E) && defined(CONFIG_PPC32))
#ifdef HUGETLB_NEED_PRELOAD
/*
* The "return 1" forces a call of update_mmu_cache, which will write a
* TLB entry. Without this, platforms that don't do a write of the TLB

7
arch/powerpc/include/asm/mmu-book3e.h
View File

@ -258,6 +258,13 @@ extern int mmu_vmemmap_psize;
#ifdef CONFIG_PPC64
extern unsigned long linear_map_top;
/*
* 64-bit booke platforms don't load the tlb in the tlb miss handler code.
* HUGETLB_NEED_PRELOAD handles this - it causes huge_ptep_set_access_flags to
* return 1, indicating that the tlb requires preloading.
*/
#define HUGETLB_NEED_PRELOAD
#endif
#endif /* !__ASSEMBLY__ */