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x86: export set_memory_ro and set_memory_rw

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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: Bruce Allan <bruce.w.allan@intel.com>
Signed-off-by: Jesse Brandeburg <jesse.brandeburg@intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
This commit is contained in:
Bruce Allan 2008-09-29 20:19:22 -07:00 committed by Ingo Molnar
parent 94aca1dac6
commit a03352d2c1
1 changed files with 2 additions and 0 deletions
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arch/x86/mm/pageattr.c
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@ -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)
{ {