diff options
| author | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-11-21 23:48:55 (GMT) |
|---|---|---|
| committer | Russell King <rmk+kernel@arm.linux.org.uk> | 2010-11-26 20:45:46 (GMT) |
| commit | 6e4beb5e682953212da48ebb9e5c90408b8d38ae (patch) | |
| tree | 7db9b9ce44dee035c738c5b292235447987bc099 /arch/arm/mm/pgd.c | |
| parent | b0d03745b18c39b8e86e70f7778f2093d2cd4ed7 (diff) | |
| download | linux-6e4beb5e682953212da48ebb9e5c90408b8d38ae.tar.xz | |
ARM: pgtable: use pXd_none_or_clear_bad() in pgd_free()
Remove knowledge of the 2-level wrapping in pgd_free(), and use the
pXd_none_or_clear_bad() macros when checking the entries.
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
Diffstat (limited to 'arch/arm/mm/pgd.c')
| -rw-r--r-- | arch/arm/mm/pgd.c | 27 |
1 files changed, 14 insertions, 13 deletions
diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c index e3eda56..d15785e 100644 --- a/arch/arm/mm/pgd.c +++ b/arch/arm/mm/pgd.c @@ -73,28 +73,29 @@ no_pgd: return NULL; } -void pgd_free(struct mm_struct *mm, pgd_t *pgd) +void pgd_free(struct mm_struct *mm, pgd_t *pgd_base) { + pgd_t *pgd; pmd_t *pmd; pgtable_t pte; - if (!pgd) + if (!pgd_base) return; - /* pgd is always present and good */ - pmd = pmd_off(pgd, 0); - if (pmd_none(*pmd)) - goto free; - if (pmd_bad(*pmd)) { - pmd_ERROR(*pmd); - pmd_clear(pmd); - goto free; - } + pgd = pgd_base + pgd_index(0); + if (pgd_none_or_clear_bad(pgd)) + goto no_pgd; + + pmd = pmd_offset(pgd, 0); + if (pmd_none_or_clear_bad(pmd)) + goto no_pmd; pte = pmd_pgtable(*pmd); pmd_clear(pmd); pte_free(mm, pte); +no_pmd: + pgd_clear(pgd); pmd_free(mm, pmd); -free: - free_pages((unsigned long) pgd, 2); +no_pgd: + free_pages((unsigned long) pgd_base, 2); } |