The patch titled Subject: mm: change ioremap to set up huge I/O mappings has been removed from the -mm tree. Its filename was mm-change-ioremap-to-set-up-huge-i-o-mappings.patch This patch was dropped because it was merged into mainline or a subsystem tree ------------------------------------------------------ From: Toshi Kani <toshi.kani@xxxxxx> Subject: mm: change ioremap to set up huge I/O mappings ioremap_pud_range() and ioremap_pmd_range() are changed to create huge I/O mappings when their capability is enabled, and a request meets required conditions -- both virtual & physical addresses are aligned by their huge page size, and a requested range fufills their huge page size. When pud_set_huge() or pmd_set_huge() returns zero, i.e. no-operation is performed, the code simply falls back to the next level. The changes are only enabled when CONFIG_HAVE_ARCH_HUGE_VMAP is defined on the architecture. Signed-off-by: Toshi Kani <toshi.kani@xxxxxx> Cc: "H. Peter Anvin" <hpa@xxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: Ingo Molnar <mingo@xxxxxxxxxx> Cc: Arnd Bergmann <arnd@xxxxxxxx> Cc: Dave Hansen <dave.hansen@xxxxxxxxx> Cc: Robert Elliott <Elliott@xxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- include/asm-generic/pgtable.h | 15 +++++++++++++++ lib/ioremap.c | 16 ++++++++++++++++ 2 files changed, 31 insertions(+) diff -puN include/asm-generic/pgtable.h~mm-change-ioremap-to-set-up-huge-i-o-mappings include/asm-generic/pgtable.h --- a/include/asm-generic/pgtable.h~mm-change-ioremap-to-set-up-huge-i-o-mappings +++ a/include/asm-generic/pgtable.h @@ -6,6 +6,7 @@ #include <linux/mm_types.h> #include <linux/bug.h> +#include <linux/errno.h> #if 4 - defined(__PAGETABLE_PUD_FOLDED) - defined(__PAGETABLE_PMD_FOLDED) != \ CONFIG_PGTABLE_LEVELS @@ -696,6 +697,20 @@ static inline int pmd_protnone(pmd_t pmd #endif /* CONFIG_MMU */ +#ifdef CONFIG_HAVE_ARCH_HUGE_VMAP +int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot); +int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot); +#else /* !CONFIG_HAVE_ARCH_HUGE_VMAP */ +static inline int pud_set_huge(pud_t *pud, phys_addr_t addr, pgprot_t prot) +{ + return 0; +} +static inline int pmd_set_huge(pmd_t *pmd, phys_addr_t addr, pgprot_t prot) +{ + return 0; +} +#endif /* CONFIG_HAVE_ARCH_HUGE_VMAP */ + #endif /* !__ASSEMBLY__ */ #ifndef io_remap_pfn_range diff -puN lib/ioremap.c~mm-change-ioremap-to-set-up-huge-i-o-mappings lib/ioremap.c --- a/lib/ioremap.c~mm-change-ioremap-to-set-up-huge-i-o-mappings +++ a/lib/ioremap.c @@ -80,6 +80,14 @@ static inline int ioremap_pmd_range(pud_ return -ENOMEM; do { next = pmd_addr_end(addr, end); + + if (ioremap_pmd_enabled() && + ((next - addr) == PMD_SIZE) && + IS_ALIGNED(phys_addr + addr, PMD_SIZE)) { + if (pmd_set_huge(pmd, phys_addr + addr, prot)) + continue; + } + if (ioremap_pte_range(pmd, addr, next, phys_addr + addr, prot)) return -ENOMEM; } while (pmd++, addr = next, addr != end); @@ -98,6 +106,14 @@ static inline int ioremap_pud_range(pgd_ return -ENOMEM; do { next = pud_addr_end(addr, end); + + if (ioremap_pud_enabled() && + ((next - addr) == PUD_SIZE) && + IS_ALIGNED(phys_addr + addr, PUD_SIZE)) { + if (pud_set_huge(pud, phys_addr + addr, prot)) + continue; + } + if (ioremap_pmd_range(pud, addr, next, phys_addr + addr, prot)) return -ENOMEM; } while (pud++, addr = next, addr != end); _ Patches currently in -mm which might be from toshi.kani@xxxxxx are origin.patch mm-x86-document-return-values-of-mapping-funcs.patch mtrr-x86-fix-mtrr-lookup-to-handle-inclusive-entry.patch mtrr-x86-remove-a-wrong-address-check-in-__mtrr_type_lookup.patch mtrr-x86-fix-mtrr-state-checks-in-mtrr_type_lookup.patch mtrr-x86-define-mtrr_type_invalid-for-mtrr_type_lookup.patch mtrr-x86-clean-up-mtrr_type_lookup.patch mtrr-mm-x86-enhance-mtrr-checks-for-kva-huge-page-mapping.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