From: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Date: Wed, 27 Feb 2008 12:44:59 +0000 (+0100)
Subject: [ARM] Fix freeing of page tables for ARM in free_pgd_slow
X-Git-Tag: firefly_0821_release~22210^2
X-Git-Url: http://demsky.eecs.uci.edu/git/?a=commitdiff_plain;h=0c82d83cb09a1c9fd4d24d32064ce827709c104b;p=firefly-linux-kernel-4.4.55.git

[ARM] Fix freeing of page tables for ARM in free_pgd_slow

Since 2f569af (CONFIG_HIGHPTE vs. sub-page page tables.) pte_free() calls
pte_lock_deinit() and dec_zone_page_state().  So free_pgd_slow must not call
the latter two when calling the first.

Signed-off-by: Uwe Kleine-König <Uwe.Kleine-Koenig@digi.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Andrew Morton <akpm@linux-foundation.org>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---

diff --git a/arch/arm/mm/pgd.c b/arch/arm/mm/pgd.c
index 500c9610ab30..e0f19ab91163 100644
--- a/arch/arm/mm/pgd.c
+++ b/arch/arm/mm/pgd.c
@@ -75,7 +75,7 @@ no_pgd:
 void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd)
 {
 	pmd_t *pmd;
-	struct page *pte;
+	pgtable_t pte;
 
 	if (!pgd)
 		return;
@@ -90,10 +90,8 @@ void free_pgd_slow(struct mm_struct *mm, pgd_t *pgd)
 		goto free;
 	}
 
-	pte = pmd_page(*pmd);
+	pte = pmd_pgtable(*pmd);
 	pmd_clear(pmd);
-	dec_zone_page_state(virt_to_page((unsigned long *)pgd), NR_PAGETABLE);
-	pte_lock_deinit(pte);
 	pte_free(mm, pte);
 	pmd_free(mm, pmd);
 free: