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>

1 files changed, 4 insertions, 11 deletions

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;