From: Becky Bruce Date: Mon, 10 Oct 2011 10:50:38 +0000 (+0000) Subject: powerpc: Fix booke hugetlb preload code for PPC_MM_SLICES and 64-bit X-Git-Tag: v3.12-rc1~4159^2~49^2~10 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8c1674de2b42d9d9f14a32445055aa525892c708;p=kernel%2Fkernel-generic.git powerpc: Fix booke hugetlb preload code for PPC_MM_SLICES and 64-bit This patch does 2 things: It corrects the code that determines the size to write into MAS1 for the PPC_MM_SLICES case (this originally came from David Gibson and I had incorrectly altered it), and it changes the methodolody used to calculate the size for !PPC_MM_SLICES to work for 64-bit as well as 32-bit. Signed-off-by: Becky Bruce Signed-off-by: David Gibson Signed-off-by: Benjamin Herrenschmidt --- diff --git a/arch/powerpc/mm/hugetlbpage-book3e.c b/arch/powerpc/mm/hugetlbpage-book3e.c index 343ad0b..4d6d849 100644 --- a/arch/powerpc/mm/hugetlbpage-book3e.c +++ b/arch/powerpc/mm/hugetlbpage-book3e.c @@ -45,23 +45,20 @@ void book3e_hugetlb_preload(struct mm_struct *mm, unsigned long ea, pte_t pte) unsigned long flags; #ifdef CONFIG_PPC_FSL_BOOK3E - int index, lz, ncams; - struct vm_area_struct *vma; + int index, ncams; #endif if (unlikely(is_kernel_addr(ea))) return; #ifdef CONFIG_PPC_MM_SLICES - psize = mmu_get_tsize(get_slice_psize(mm, ea)); - tsize = mmu_get_psize(psize); + psize = get_slice_psize(mm, ea); + tsize = mmu_get_tsize(psize); shift = mmu_psize_defs[psize].shift; #else - vma = find_vma(mm, ea); - psize = vma_mmu_pagesize(vma); /* returns actual size in bytes */ - asm (PPC_CNTLZL "%0,%1" : "=r" (lz) : "r" (psize)); - shift = 31 - lz; - tsize = 21 - lz; + psize = vma_mmu_pagesize(find_vma(mm, ea)); + shift = __ilog2(psize); + tsize = shift - 10; #endif /*