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| author | Jeff Garzik <jgarzik@pretzel.yyz.us> | 2005-06-26 23:42:30 -0400 |
|---|---|---|
| committer | Jeff Garzik <jgarzik@pobox.com> | 2005-06-26 23:42:30 -0400 |
| commit | f45727d52d1581e9ff4df9d1a12a60789ad2d1eb (patch) | |
| tree | 773ae25f98542e6d382c688f7e85e8137d065614 /arch/i386/mm/highmem.c | |
| parent | 4c925f452cfd16c690209e96821ee094e09a2404 (diff) | |
| parent | 5696c1944a33b4434a9a1ebb6383b906afd43a10 (diff) | |
| download | kernel-crypto-f45727d52d1581e9ff4df9d1a12a60789ad2d1eb.tar.gz kernel-crypto-f45727d52d1581e9ff4df9d1a12a60789ad2d1eb.tar.xz kernel-crypto-f45727d52d1581e9ff4df9d1a12a60789ad2d1eb.zip | |
Merge /spare/repo/netdev-2.6/ branch 'ieee80211'
Diffstat (limited to 'arch/i386/mm/highmem.c')
| -rw-r--r-- | arch/i386/mm/highmem.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/arch/i386/mm/highmem.c b/arch/i386/mm/highmem.c index fc4c4cad4e9..b6eb4dcb877 100644 --- a/arch/i386/mm/highmem.c +++ b/arch/i386/mm/highmem.c @@ -1,4 +1,5 @@ #include <linux/highmem.h> +#include <linux/module.h> void *kmap(struct page *page) { @@ -74,6 +75,24 @@ void kunmap_atomic(void *kvaddr, enum km_type type) preempt_check_resched(); } +/* 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, enum km_type type) +{ + enum fixed_addresses idx; + unsigned long vaddr; + + inc_preempt_count(); + + idx = type + KM_TYPE_NR*smp_processor_id(); + vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx); + set_pte(kmap_pte-idx, pfn_pte(pfn, kmap_prot)); + __flush_tlb_one(vaddr); + + return (void*) vaddr; +} + struct page *kmap_atomic_to_page(void *ptr) { unsigned long idx, vaddr = (unsigned long)ptr; @@ -87,3 +106,8 @@ struct page *kmap_atomic_to_page(void *ptr) return pte_page(*pte); } +EXPORT_SYMBOL(kmap); +EXPORT_SYMBOL(kunmap); +EXPORT_SYMBOL(kmap_atomic); +EXPORT_SYMBOL(kunmap_atomic); +EXPORT_SYMBOL(kmap_atomic_to_page); |