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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2013-07-23 20:57:57 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2013-08-22 12:20:06 +0200
commite509861105a3c1425f3f929bd631f88340b499bf (patch)
tree0616b1c17c1f88dfb63a3bce0774a3e518f49119 /arch/s390/mm/dump_pagetables.c
parent416fd0ffb14afead5b1feea14bbf33c2277942ef (diff)
downloadop-kernel-dev-e509861105a3c1425f3f929bd631f88340b499bf.zip
op-kernel-dev-e509861105a3c1425f3f929bd631f88340b499bf.tar.gz
s390/mm: cleanup page table definitions
Improve the encoding of the different pte types and the naming of the page, segment table and region table bits. Due to the different pte encoding the hugetlbfs primitives need to be adapted as well. To improve compatability with common code make the huge ptes use the encoding of normal ptes. The conversion between the pte and pmd encoding for a huge pte is done with set_huge_pte_at and huge_ptep_get. Overall the code is now easier to understand. Reviewed-by: Gerald Schaefer <gerald.schaefer@de.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/mm/dump_pagetables.c')
-rw-r--r--arch/s390/mm/dump_pagetables.c18
1 files changed, 9 insertions, 9 deletions
diff --git a/arch/s390/mm/dump_pagetables.c b/arch/s390/mm/dump_pagetables.c
index 3ad65b0..46d517c 100644
--- a/arch/s390/mm/dump_pagetables.c
+++ b/arch/s390/mm/dump_pagetables.c
@@ -53,7 +53,7 @@ static void print_prot(struct seq_file *m, unsigned int pr, int level)
seq_printf(m, "I\n");
return;
}
- seq_printf(m, "%s", pr & _PAGE_RO ? "RO " : "RW ");
+ seq_printf(m, "%s", pr & _PAGE_PROTECT ? "RO " : "RW ");
seq_printf(m, "%s", pr & _PAGE_CO ? "CO " : " ");
seq_putc(m, '\n');
}
@@ -105,12 +105,12 @@ static void note_page(struct seq_file *m, struct pg_state *st,
}
/*
- * The actual page table walker functions. In order to keep the implementation
- * of print_prot() short, we only check and pass _PAGE_INVALID and _PAGE_RO
- * flags to note_page() if a region, segment or page table entry is invalid or
- * read-only.
- * After all it's just a hint that the current level being walked contains an
- * invalid or read-only entry.
+ * The actual page table walker functions. In order to keep the
+ * implementation of print_prot() short, we only check and pass
+ * _PAGE_INVALID and _PAGE_PROTECT flags to note_page() if a region,
+ * segment or page table entry is invalid or read-only.
+ * After all it's just a hint that the current level being walked
+ * contains an invalid or read-only entry.
*/
static void walk_pte_level(struct seq_file *m, struct pg_state *st,
pmd_t *pmd, unsigned long addr)
@@ -122,14 +122,14 @@ static void walk_pte_level(struct seq_file *m, struct pg_state *st,
for (i = 0; i < PTRS_PER_PTE && addr < max_addr; i++) {
st->current_address = addr;
pte = pte_offset_kernel(pmd, addr);
- prot = pte_val(*pte) & (_PAGE_RO | _PAGE_INVALID);
+ prot = pte_val(*pte) & (_PAGE_PROTECT | _PAGE_INVALID);
note_page(m, st, prot, 4);
addr += PAGE_SIZE;
}
}
#ifdef CONFIG_64BIT
-#define _PMD_PROT_MASK (_SEGMENT_ENTRY_RO | _SEGMENT_ENTRY_CO)
+#define _PMD_PROT_MASK (_SEGMENT_ENTRY_PROTECT | _SEGMENT_ENTRY_CO)
#else
#define _PMD_PROT_MASK 0
#endif
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