Signed-off-by: Thomas Gleixner tglx@linutronix.de Cc: Thomas Bogendoerfer tsbogend@alpha.franken.de Cc: linux-mips@vger.kernel.org --- Note: Completely untested --- arch/mips/Kconfig | 1 arch/mips/include/asm/highmem.h | 4 +- arch/mips/mm/highmem.c | 77 ---------------------------------------- arch/mips/mm/init.c | 3 - 4 files changed, 3 insertions(+), 82 deletions(-)
--- a/arch/mips/Kconfig +++ b/arch/mips/Kconfig @@ -2654,6 +2654,7 @@ config MIPS_CRC_SUPPORT config HIGHMEM bool "High Memory Support" depends on 32BIT && CPU_SUPPORTS_HIGHMEM && SYS_SUPPORTS_HIGHMEM && !CPU_MIPS32_3_5_EVA + select KMAP_ATOMIC_GENERIC
config CPU_SUPPORTS_HIGHMEM bool --- a/arch/mips/include/asm/highmem.h +++ b/arch/mips/include/asm/highmem.h @@ -48,11 +48,11 @@ extern pte_t *pkmap_page_table;
#define ARCH_HAS_KMAP_FLUSH_TLB extern void kmap_flush_tlb(unsigned long addr); -extern void *kmap_atomic_pfn(unsigned long pfn);
#define flush_cache_kmaps() BUG_ON(cpu_has_dc_aliases)
-extern void kmap_init(void); +#define arch_kmap_temp_post_map(vaddr, pteval) local_flush_tlb_one(vaddr) +#define arch_kmap_temp_post_unmap(vaddr) local_flush_tlb_one(vaddr)
#endif /* __KERNEL__ */
--- a/arch/mips/mm/highmem.c +++ b/arch/mips/mm/highmem.c @@ -8,8 +8,6 @@ #include <asm/fixmap.h> #include <asm/tlbflush.h>
-static pte_t *kmap_pte; - unsigned long highstart_pfn, highend_pfn;
void kmap_flush_tlb(unsigned long addr) @@ -17,78 +15,3 @@ void kmap_flush_tlb(unsigned long addr) flush_tlb_one(addr); } EXPORT_SYMBOL(kmap_flush_tlb); - -void *kmap_atomic_high_prot(struct page *page, pgprot_t prot) -{ - unsigned long vaddr; - int idx, type; - - type = kmap_atomic_idx_push(); - idx = type + KM_TYPE_NR*smp_processor_id(); - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); -#ifdef CONFIG_DEBUG_HIGHMEM - BUG_ON(!pte_none(*(kmap_pte - idx))); -#endif - set_pte(kmap_pte-idx, mk_pte(page, prot)); - local_flush_tlb_one((unsigned long)vaddr); - - return (void*) vaddr; -} -EXPORT_SYMBOL(kmap_atomic_high_prot); - -void kunmap_atomic_high(void *kvaddr) -{ - unsigned long vaddr = (unsigned long) kvaddr & PAGE_MASK; - int type __maybe_unused; - - if (vaddr < FIXADDR_START) - return; - - type = kmap_atomic_idx(); -#ifdef CONFIG_DEBUG_HIGHMEM - { - int idx = type + KM_TYPE_NR * smp_processor_id(); - - BUG_ON(vaddr != __fix_to_virt(FIX_KMAP_BEGIN + idx)); - - /* - * force other mappings to Oops if they'll try to access - * this pte without first remap it - */ - pte_clear(&init_mm, vaddr, kmap_pte-idx); - local_flush_tlb_one(vaddr); - } -#endif - kmap_atomic_idx_pop(); -} -EXPORT_SYMBOL(kunmap_atomic_high); - -/* - * This is the same as kmap_atomic() but can map memory that doesn't - * have a struct page associated with it. - */ -void *kmap_atomic_pfn(unsigned long pfn) -{ - unsigned long vaddr; - int idx, type; - - preempt_disable(); - pagefault_disable(); - - type = kmap_atomic_idx_push(); - idx = type + KM_TYPE_NR*smp_processor_id(); - vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); - set_pte(kmap_pte-idx, pfn_pte(pfn, PAGE_KERNEL)); - flush_tlb_one(vaddr); - - return (void*) vaddr; -} - -void __init kmap_init(void) -{ - unsigned long kmap_vstart; - - /* cache the first kmap pte */ - kmap_vstart = __fix_to_virt(FIX_KMAP_BEGIN); - kmap_pte = virt_to_kpte(kmap_vstart); -} --- a/arch/mips/mm/init.c +++ b/arch/mips/mm/init.c @@ -402,9 +402,6 @@ void __init paging_init(void)
pagetable_init();
-#ifdef CONFIG_HIGHMEM - kmap_init(); -#endif #ifdef CONFIG_ZONE_DMA max_zone_pfns[ZONE_DMA] = MAX_DMA_PFN; #endif