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authorBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-12-01 23:28:35 +0100
committerBenjamin Herrenschmidt <benh@kernel.crashing.org>2009-12-01 23:28:35 +0100
commit5a7b4193e564d1611ecf1cd859aed60d5612d78f (patch)
tree8831669121df3d50845718b848d7c6e4bc51be26 /arch/powerpc/mm
parentpowerpc/of_serial: Add missing ns16550a id (diff)
downloadlinux-5a7b4193e564d1611ecf1cd859aed60d5612d78f.tar.xz
linux-5a7b4193e564d1611ecf1cd859aed60d5612d78f.zip
Revert "powerpc/mm: Fix bug in pagetable cache cleanup with CONFIG_PPC_SUBPAGE_PROT"
This reverts commit c045256d146800ea1d741a8e9e377dada6b7e195. It breaks build when CONFIG_PPC_SUBPAGE_PROT is not set. I will commit a fixed version separately Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Diffstat (limited to 'arch/powerpc/mm')
-rw-r--r--arch/powerpc/mm/hash_utils_64.c6
-rw-r--r--arch/powerpc/mm/mmu_context_hash64.c2
-rw-r--r--arch/powerpc/mm/subpage-prot.c15
3 files changed, 7 insertions, 16 deletions
diff --git a/arch/powerpc/mm/hash_utils_64.c b/arch/powerpc/mm/hash_utils_64.c
index 50f867d657df..6810128aba30 100644
--- a/arch/powerpc/mm/hash_utils_64.c
+++ b/arch/powerpc/mm/hash_utils_64.c
@@ -835,9 +835,9 @@ void demote_segment_4k(struct mm_struct *mm, unsigned long addr)
* Result is 0: full permissions, _PAGE_RW: read-only,
* _PAGE_USER or _PAGE_USER|_PAGE_RW: no access.
*/
-static int subpage_protection(struct mm_struct *mm, unsigned long ea)
+static int subpage_protection(pgd_t *pgdir, unsigned long ea)
{
- struct subpage_prot_table *spt = &mm->context.spt;
+ struct subpage_prot_table *spt = pgd_subpage_prot(pgdir);
u32 spp = 0;
u32 **sbpm, *sbpp;
@@ -865,7 +865,7 @@ static int subpage_protection(struct mm_struct *mm, unsigned long ea)
}
#else /* CONFIG_PPC_SUBPAGE_PROT */
-static inline int subpage_protection(struct mm_struct *mm, unsigned long ea)
+static inline int subpage_protection(pgd_t *pgdir, unsigned long ea)
{
return 0;
}
diff --git a/arch/powerpc/mm/mmu_context_hash64.c b/arch/powerpc/mm/mmu_context_hash64.c
index b910d37aea1a..b9e4cc2c2057 100644
--- a/arch/powerpc/mm/mmu_context_hash64.c
+++ b/arch/powerpc/mm/mmu_context_hash64.c
@@ -76,7 +76,6 @@ int init_new_context(struct task_struct *tsk, struct mm_struct *mm)
*/
if (slice_mm_new_context(mm))
slice_set_user_psize(mm, mmu_virtual_psize);
- subpage_prot_init_new_context(mm);
mm->context.id = index;
return 0;
@@ -93,6 +92,5 @@ EXPORT_SYMBOL_GPL(__destroy_context);
void destroy_context(struct mm_struct *mm)
{
__destroy_context(mm->context.id);
- subpage_prot_free(mm);
mm->context.id = NO_CONTEXT;
}
diff --git a/arch/powerpc/mm/subpage-prot.c b/arch/powerpc/mm/subpage-prot.c
index a040b81e93bd..4cafc0c33d0a 100644
--- a/arch/powerpc/mm/subpage-prot.c
+++ b/arch/powerpc/mm/subpage-prot.c
@@ -24,9 +24,9 @@
* Also makes sure that the subpage_prot_table structure is
* reinitialized for the next user.
*/
-void subpage_prot_free(struct mm_struct *mm)
+void subpage_prot_free(pgd_t *pgd)
{
- struct subpage_prot_table *spt = &mm->context.spt;
+ struct subpage_prot_table *spt = pgd_subpage_prot(pgd);
unsigned long i, j, addr;
u32 **p;
@@ -51,13 +51,6 @@ void subpage_prot_free(struct mm_struct *mm)
spt->maxaddr = 0;
}
-void subpage_prot_init_new_context(struct mm_struct *mm)
-{
- struct subpage_prot_table *spt = &mm->context.spt;
-
- memset(spt, 0, sizeof(*spt));
-}
-
static void hpte_flush_range(struct mm_struct *mm, unsigned long addr,
int npages)
{
@@ -94,7 +87,7 @@ static void hpte_flush_range(struct mm_struct *mm, unsigned long addr,
static void subpage_prot_clear(unsigned long addr, unsigned long len)
{
struct mm_struct *mm = current->mm;
- struct subpage_prot_table *spt = &mm->context.spt;
+ struct subpage_prot_table *spt = pgd_subpage_prot(mm->pgd);
u32 **spm, *spp;
int i, nw;
unsigned long next, limit;
@@ -143,7 +136,7 @@ static void subpage_prot_clear(unsigned long addr, unsigned long len)
long sys_subpage_prot(unsigned long addr, unsigned long len, u32 __user *map)
{
struct mm_struct *mm = current->mm;
- struct subpage_prot_table *spt = &mm->context.spt;
+ struct subpage_prot_table *spt = pgd_subpage_prot(mm->pgd);
u32 **spm, *spp;
int i, nw;
unsigned long next, limit;