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linux
[PATCH] ARM: Factor out common pmd_populate functionality
Both pmd_populate variants set two pmd entries before
ensuring that they are flushed from the cache. Separate
this functionality into __pmd_populate().
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
+9
-15
include/asm-arm/pgalloc.h
+9
-15
include/asm-arm/pgalloc.h
···
89
__free_page(pte);
90
}
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/*
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* Populate the pmdp entry with a pointer to the pte. This pmd is part
94
* of the mm address space.
···
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pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
107
{
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unsigned long pte_ptr = (unsigned long)ptep;
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-
unsigned long pmdval;
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-
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-
BUG_ON(mm != &init_mm);
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/*
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* The pmd must be loaded with the physical
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* address of the PTE table
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*/
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pte_ptr -= PTRS_PER_PTE * sizeof(void *);
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-
pmdval = __pa(pte_ptr) | _PAGE_KERNEL_TABLE;
119
-
pmdp[0] = __pmd(pmdval);
120
-
pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
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-
flush_pmd_entry(pmdp);
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}
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
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{
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-
unsigned long pmdval;
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-
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-
BUG_ON(mm == &init_mm);
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-
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-
pmdval = page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE;
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-
pmdp[0] = __pmd(pmdval);
133
-
pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
134
-
flush_pmd_entry(pmdp);
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}
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#endif
···
89
__free_page(pte);
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}
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+
static inline void __pmd_populate(pmd_t *pmdp, unsigned long pmdval)
93
+
{
94
+
pmdp[0] = __pmd(pmdval);
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+
pmdp[1] = __pmd(pmdval + 256 * sizeof(pte_t));
96
+
flush_pmd_entry(pmdp);
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+
}
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+
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/*
100
* Populate the pmdp entry with a pointer to the pte. This pmd is part
101
* of the mm address space.
···
99
pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmdp, pte_t *ptep)
100
{
101
unsigned long pte_ptr = (unsigned long)ptep;
102
103
/*
104
* The pmd must be loaded with the physical
105
* address of the PTE table
106
*/
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pte_ptr -= PTRS_PER_PTE * sizeof(void *);
108
+
__pmd_populate(pmdp, __pa(pte_ptr) | _PAGE_KERNEL_TABLE);
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}
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static inline void
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pmd_populate(struct mm_struct *mm, pmd_t *pmdp, struct page *ptep)
113
{
114
+
__pmd_populate(pmdp, page_to_pfn(ptep) << PAGE_SHIFT | _PAGE_USER_TABLE);
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}
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#endif