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x86: debug check for kmap_atomic_pfn and iomap_atomic_prot_pfn() 

It may be useful for kmap_atomic_pfn() and iomap_atomic_prot_pfn()
to check invalid kmap usage as well as kmap_atomic.

Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090311143449.GB22244@localhost.localdomain>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Akinobu Mita 2009-03-11 23:34:50 +09:00 committed by Ingo Molnar
parent bb6d59ca92
commit 12074fa107
1 changed files with 2 additions and 0 deletions
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2
arch/x86/mm/highmem_32.c
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@ -128,6 +128,8 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot)
pagefault_disable();
debug_kmap_atomic_prot(type);
idx = type + KM_TYPE_NR * smp_processor_id();
vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);
set_pte(kmap_pte - idx, pfn_pte(pfn, prot));