The patch titled sparc64: use RCU page table freeing has been added to the -mm tree. Its filename is sparc64-use-rcu-page-table-freeing.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: sparc64: use RCU page table freeing From: David S. Miller <davem@xxxxxxxxxxxxx> Make use of the generic RCU page table freeing on Sparc64, doing so allows for race-free software page-table walkers like gup_fast(). Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx> Signed-off-by: Peter Zijlstra <a.p.zijlstra@xxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/sparc/Kconfig | 1 arch/sparc/include/asm/pgalloc_64.h | 48 ++++++++++++++++++++++++-- 2 files changed, 47 insertions(+), 2 deletions(-) diff -puN arch/sparc/Kconfig~sparc64-use-rcu-page-table-freeing arch/sparc/Kconfig --- a/arch/sparc/Kconfig~sparc64-use-rcu-page-table-freeing +++ a/arch/sparc/Kconfig @@ -53,6 +53,7 @@ config SPARC64 select HAVE_PERF_EVENTS select PERF_USE_VMALLOC select IRQ_PREFLOW_FASTEOI + select HAVE_RCU_TABLE_FREE if SMP config ARCH_DEFCONFIG string diff -puN arch/sparc/include/asm/pgalloc_64.h~sparc64-use-rcu-page-table-freeing arch/sparc/include/asm/pgalloc_64.h --- a/arch/sparc/include/asm/pgalloc_64.h~sparc64-use-rcu-page-table-freeing +++ a/arch/sparc/include/asm/pgalloc_64.h @@ -76,7 +76,51 @@ static inline void pte_free(struct mm_st #define check_pgt_cache() do { } while (0) -#define __pte_free_tlb(tlb, pte, addr) pte_free((tlb)->mm, pte) -#define __pmd_free_tlb(tlb, pmd, addr) pmd_free((tlb)->mm, pmd) +static inline void pgtable_free(void *table, bool is_page) +{ + if (is_page) + free_page((unsigned long)table); + else + kmem_cache_free(pgtable_cache, table); +} + +#ifdef CONFIG_SMP + +struct mmu_gather; +extern void tlb_remove_table(struct mmu_gather *, void *); + +static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page) +{ + unsigned long pgf = (unsigned long)table; + if (is_page) + pgf |= 0x1UL; + tlb_remove_table(tlb, (void *)pgf); +} + +static inline void __tlb_remove_table(void *_table) +{ + void *table = (void *)((unsigned long)_table & ~0x1UL); + bool is_page = false; + + if ((unsigned long)_table & 0x1UL) + is_page = true; + pgtable_free(table, is_page); +} +#else /* CONFIG_SMP */ +static inline void pgtable_free_tlb(struct mmu_gather *tlb, void *table, bool is_page) +{ + pgtable_free(table, is_page); +} +#endif /* !CONFIG_SMP */ + +static inline void __pte_free_tlb(struct mmu_gather *tlb, struct page *ptepage, + unsigned long address) +{ + pgtable_page_dtor(ptepage); + pgtable_free_tlb(tlb, page_address(ptepage), true); +} + +#define __pmd_free_tlb(tlb, pmd, addr) \ + pgtable_free_tlb(tlb, pmd, false) #endif /* _SPARC64_PGALLOC_H */ _ Patches currently in -mm which might be from davem@xxxxxxxxxxxxx are linux-next.patch maintainers-orphan-framerelay-dlci.patch drivers-net-skgec-support-dlink-dge-530t-rev-c1.patch pci-make-the-struct-pci_dev-argument-of-pci_fixup_irqs-const.patch sparc-exec-remove-redundant-addr_limit-assignment.patch sparc64-kill-page-table-quicklists.patch sparc64-use-rcu-page-table-freeing.patch sparc64-add-support-for-_page_special.patch sparc64-implement-get_user_pages_fast.patch kprobes-silence-debug_strict_user_copy_checks=y-warning.patch notifiers-cpu-move-cpu-notifiers-into-cpuh.patch notifiers-net-move-netdevice-notifiers-into-netdeviceh.patch notifiers-sys-move-reboot-notifiers-into-rebooth.patch notifiers-pm-move-pm-notifiers-into-suspendh.patch notifiers-pm-move-pm-notifiers-into-suspendh-update.patch notifiers-vt-move-vt-notifiers-into-vth.patch atomic-use-linux-atomich.patch atomic-move-atomic_add_unless-to-generic-code.patch atomic-cleanup-asm-generic-atomich-inclusion.patch atomic-update-comments-in-atomich.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html