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Commit 12074fa1 authored by Akinobu Mita's avatar Akinobu Mita Committed by Ingo Molnar
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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: default avatarAkinobu Mita <akinobu.mita@gmail.com>
LKML-Reference: <20090311143449.GB22244@localhost.localdomain>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent bb6d59ca

arch/x86/mm/highmem_32.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -128,6 +128,8 @@ void *kmap_atomic_prot_pfn(unsigned long pfn, enum km_type type, pgprot_t prot) 




	pagefault_disable();

	pagefault_disable();





	debug_kmap_atomic_prot(type);



	idx = type + KM_TYPE_NR * smp_processor_id();

	idx = type + KM_TYPE_NR * smp_processor_id();

	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);

	vaddr = __fix_to_virt(FIX_KMAP_BEGIN + idx);

	set_pte(kmap_pte - idx, pfn_pte(pfn, prot));

	set_pte(kmap_pte - idx, pfn_pte(pfn, prot));