Messages in this thread Patch in this message | | | Date | Sun, 28 Oct 2012 14:10:14 +0100 | From | Ingo Molnar <> | Subject | [PATCH] s390: Add pmd_mknotpresent() |
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There's a related problem on s390: other THP implementations have pmd_mknotpresent() while s390 not, resulting in:
mm/huge_memory.c:1543:2: error: implicit declaration of function 'pmd_mknotpresent'
The (untested!) patch below adds the s390 version of this method.
Gerald, Martin, did I get the S390 details right?
Thanks,
Ingo
Signed-off-by: Ingo Molnar <mingo@kernel.org> --- diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index 098fc5a..b820ff1 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -1310,6 +1310,12 @@ static inline pmd_t pmd_mkyoung(pmd_t pmd) return pmd; } +static inline pmd_t pmd_mknotpresent(pmd_t pmd) +{ + pmd_val(pmd) &= ~_SEGMENT_ENTRY_ORIGIN; + return pmd; +} + #define __HAVE_ARCH_PMDP_TEST_AND_CLEAR_YOUNG static inline int pmdp_test_and_clear_young(struct vm_area_struct *vma, unsigned long address, pmd_t *pmdp)
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