powerpc: handle pgtable_page_ctor() fail
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Paul Mackerras <paulus@samba.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
diff --git a/arch/powerpc/include/asm/pgalloc-64.h b/arch/powerpc/include/asm/pgalloc-64.h
index f65e27b..16cb92d 100644
--- a/arch/powerpc/include/asm/pgalloc-64.h
+++ b/arch/powerpc/include/asm/pgalloc-64.h
@@ -91,7 +91,10 @@
if (!pte)
return NULL;
page = virt_to_page(pte);
- pgtable_page_ctor(page);
+ if (!pgtable_page_ctor(page)) {
+ __free_page(page);
+ return NULL;
+ }
return page;
}
diff --git a/arch/powerpc/mm/pgtable_32.c b/arch/powerpc/mm/pgtable_32.c
index 6c856fb..5b96017 100644
--- a/arch/powerpc/mm/pgtable_32.c
+++ b/arch/powerpc/mm/pgtable_32.c
@@ -121,7 +121,10 @@
ptepage = alloc_pages(flags, 0);
if (!ptepage)
return NULL;
- pgtable_page_ctor(ptepage);
+ if (!pgtable_page_ctor(ptepage)) {
+ __free_page(ptepage);
+ return NULL;
+ }
return ptepage;
}
diff --git a/arch/powerpc/mm/pgtable_64.c b/arch/powerpc/mm/pgtable_64.c
index 536eec72..9d95786 100644
--- a/arch/powerpc/mm/pgtable_64.c
+++ b/arch/powerpc/mm/pgtable_64.c
@@ -378,6 +378,10 @@
__GFP_REPEAT | __GFP_ZERO);
if (!page)
return NULL;
+ if (!kernel && !pgtable_page_ctor(page)) {
+ __free_page(page);
+ return NULL;
+ }
ret = page_address(page);
spin_lock(&mm->page_table_lock);
@@ -392,9 +396,6 @@
}
spin_unlock(&mm->page_table_lock);
- if (!kernel)
- pgtable_page_ctor(page);
-
return (pte_t *)ret;
}