2672391169
In case other architectures require RCU freed page-tables to implement gup_fast() and software filled hashes and similar things, provide the means to do so by moving the logic into generic code. Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl> Requested-by: David Miller <davem@davemloft.net> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Jeff Dike <jdike@addtoit.com> Cc: Richard Weinberger <richard@nod.at> Cc: Tony Luck <tony.luck@intel.com> Cc: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com> Cc: Hugh Dickins <hughd@google.com> Cc: Mel Gorman <mel@csn.ul.ie> Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com> Cc: Nick Piggin <npiggin@kernel.dk> Cc: Namhyung Kim <namhyung@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
69 lines
1.7 KiB
C
69 lines
1.7 KiB
C
#ifndef _ASM_POWERPC_PGALLOC_H
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#define _ASM_POWERPC_PGALLOC_H
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#ifdef __KERNEL__
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#include <linux/mm.h>
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#ifdef CONFIG_PPC_BOOK3E
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extern void tlb_flush_pgtable(struct mmu_gather *tlb, unsigned long address);
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#else /* CONFIG_PPC_BOOK3E */
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static inline void tlb_flush_pgtable(struct mmu_gather *tlb,
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unsigned long address)
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{
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}
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#endif /* !CONFIG_PPC_BOOK3E */
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static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
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{
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free_page((unsigned long)pte);
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}
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static inline void pte_free(struct mm_struct *mm, pgtable_t ptepage)
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{
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pgtable_page_dtor(ptepage);
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__free_page(ptepage);
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}
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#ifdef CONFIG_PPC64
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#include <asm/pgalloc-64.h>
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#else
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#include <asm/pgalloc-32.h>
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#endif
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#ifdef CONFIG_SMP
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struct mmu_gather;
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extern void tlb_remove_table(struct mmu_gather *, void *);
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, int shift)
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{
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unsigned long pgf = (unsigned long)table;
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BUG_ON(shift > MAX_PGTABLE_INDEX_SIZE);
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pgf |= shift;
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tlb_remove_table(tlb, (void *)pgf);
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}
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static inline void __tlb_remove_table(void *_table)
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{
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void *table = (void *)((unsigned long)_table & ~MAX_PGTABLE_INDEX_SIZE);
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unsigned shift = (unsigned long)_table & MAX_PGTABLE_INDEX_SIZE;
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pgtable_free(table, shift);
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}
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#else /* CONFIG_SMP */
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static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, unsigned shift)
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{
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pgtable_free(table, shift);
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}
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#endif /* !CONFIG_SMP */
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static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage,
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unsigned long address)
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{
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tlb_flush_pgtable(tlb, address);
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pgtable_page_dtor(ptepage);
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pgtable_free_tlb(tlb, page_address(ptepage), 0);
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}
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#endif /* __KERNEL__ */
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#endif /* _ASM_POWERPC_PGALLOC_H */
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