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Commit a03352d2 authored by Bruce Allan's avatar Bruce Allan Committed by Ingo Molnar
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x86: export set_memory_ro and set_memory_rw 



Export set_memory_ro() and set_memory_rw() calls for use by drivers that need
to have more debug information about who might be writing to memory space.
this was initially developed for use while debugging a memory corruption
problem with e1000e.

Signed-off-by: default avatarBruce Allan <bruce.w.allan@intel.com>
Signed-off-by: default avatarJesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: default avatarIngo Molnar <mingo@elte.hu>
parent 94aca1da

arch/x86/mm/pageattr.c

+2 −0
Original line number Original line Diff line number Diff line
@@ -906,11 +906,13 @@ int set_memory_ro(unsigned long addr, int numpages) 
{

{

	return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_RW));

	return change_page_attr_clear(addr, numpages, __pgprot(_PAGE_RW));

}

}

EXPORT_SYMBOL_GPL(set_memory_ro);





int set_memory_rw(unsigned long addr, int numpages)

int set_memory_rw(unsigned long addr, int numpages)

{

{

	return change_page_attr_set(addr, numpages, __pgprot(_PAGE_RW));

	return change_page_attr_set(addr, numpages, __pgprot(_PAGE_RW));

}

}

EXPORT_SYMBOL_GPL(set_memory_rw);





int set_memory_np(unsigned long addr, int numpages)

int set_memory_np(unsigned long addr, int numpages)

{

{