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| author | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 07:28:37 -0800 |
|---|---|---|
| committer | Trond Myklebust <trond.myklebust@primarydata.com> | 2015-02-18 07:28:37 -0800 |
| commit | 65d2918e716afb89359cfa59734d76c1ff8700cb (patch) | |
| tree | 4685404f96642243d62c3a1a823340913d087090 /arch/powerpc/mm/pgtable_32.c | |
| parent | bf40e5561fd288a505d5d8d8bf45eef96fe7253d (diff) | |
| parent | 338d00cfef07d74a072f96821c64b20f98517d72 (diff) | |
Merge branch 'cleanups'
Merge cleanups requested by Linus.
* cleanups: (3 commits)
pnfs: Refactor the *_layout_mark_request_commit to use pnfs_layout_mark_request_commit
nfs: Can call nfs_clear_page_commit() instead
nfs: Provide and use helper functions for marking a page as unstable
Diffstat (limited to 'arch/powerpc/mm/pgtable_32.c')
| -rw-r--r-- | arch/powerpc/mm/pgtable_32.c | 19 |
1 files changed, 15 insertions, 4 deletions
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c index 50fad3801f3..03b1a3b0fbd 100644 --- a/arch/powerpc/mm/pgtable_32.c +++ b/arch/powerpc/mm/pgtable_32.c @@ -63,7 +63,6 @@ void setbat(int index, unsigned long virt, phys_addr_t phys, #endif /* HAVE_BATS */ #ifdef HAVE_TLBCAM -extern unsigned int tlbcam_index; extern phys_addr_t v_mapped_by_tlbcam(unsigned long va); extern unsigned long p_mapped_by_tlbcam(phys_addr_t pa); #else /* !HAVE_TLBCAM */ @@ -73,13 +72,25 @@ extern unsigned long p_mapped_by_tlbcam(phys_addr_t pa); #define PGDIR_ORDER (32 + PGD_T_LOG2 - PGDIR_SHIFT) +#ifndef CONFIG_PPC_4K_PAGES +static struct kmem_cache *pgtable_cache; + +void pgtable_cache_init(void) +{ + pgtable_cache = kmem_cache_create("PGDIR cache", 1 << PGDIR_ORDER, + 1 << PGDIR_ORDER, 0, NULL); + if (pgtable_cache == NULL) + panic("Couldn't allocate pgtable caches"); +} +#endif + pgd_t *pgd_alloc(struct mm_struct *mm) { pgd_t *ret; /* pgdir take page or two with 4K pages and a page fraction otherwise */ #ifndef CONFIG_PPC_4K_PAGES - ret = kzalloc(1 << PGDIR_ORDER, GFP_KERNEL); + ret = kmem_cache_alloc(pgtable_cache, GFP_KERNEL | __GFP_ZERO); #else ret = (pgd_t *)__get_free_pages(GFP_KERNEL|__GFP_ZERO, PGDIR_ORDER - PAGE_SHIFT); @@ -90,7 +101,7 @@ pgd_t *pgd_alloc(struct mm_struct *mm) void pgd_free(struct mm_struct *mm, pgd_t *pgd) { #ifndef CONFIG_PPC_4K_PAGES - kfree((void *)pgd); + kmem_cache_free(pgtable_cache, (void *)pgd); #else free_pages((unsigned long)pgd, PGDIR_ORDER - PAGE_SHIFT); #endif @@ -147,7 +158,7 @@ void __iomem * ioremap_prot(phys_addr_t addr, unsigned long size, unsigned long flags) { /* writeable implies dirty for kernel addresses */ - if (flags & _PAGE_RW) + if ((flags & (_PAGE_RW | _PAGE_RO)) != _PAGE_RO) flags |= _PAGE_DIRTY | _PAGE_HWWRITE; /* we don't want to let _PAGE_USER and _PAGE_EXEC leak out */ |