sparc64: Fix get_user_pages_fast() wrt. THP.
Mostly mirrors the s390 logic, as unlike x86 we don't need the
SetPageReferenced() bits.
On sparc64 we also lack a user/privileged bit in the huge PMDs.
In order to make this work for THP and non-THP builds, some header
file adjustments were necessary. Namely, provide the PMD_HUGE_* bit
defines and the pmd_large() inline unconditionally rather than
protected by TRANSPARENT_HUGEPAGE.
Reported-by: Aneesh Kumar K.V <aneesh.kumar@linux.vnet.ibm.com>
Signed-off-by: David S. Miller <davem@davemloft.net>
diff --git a/arch/sparc/include/asm/pgtable_64.h b/arch/sparc/include/asm/pgtable_64.h
index 7870be0..08fcce90 100644
--- a/arch/sparc/include/asm/pgtable_64.h
+++ b/arch/sparc/include/asm/pgtable_64.h
@@ -71,7 +71,6 @@
#define PMD_PADDR _AC(0xfffffffe,UL)
#define PMD_PADDR_SHIFT _AC(11,UL)
-#ifdef CONFIG_TRANSPARENT_HUGEPAGE
#define PMD_ISHUGE _AC(0x00000001,UL)
/* This is the PMD layout when PMD_ISHUGE is set. With 4MB huge
@@ -86,7 +85,6 @@
#define PMD_HUGE_ACCESSED _AC(0x00000080,UL)
#define PMD_HUGE_EXEC _AC(0x00000040,UL)
#define PMD_HUGE_SPLITTING _AC(0x00000020,UL)
-#endif
/* PGDs point to PMD tables which are 8K aligned. */
#define PGD_PADDR _AC(0xfffffffc,UL)
@@ -628,6 +626,12 @@
return pte_val(pte) & _PAGE_SPECIAL;
}
+static inline int pmd_large(pmd_t pmd)
+{
+ return (pmd_val(pmd) & (PMD_ISHUGE | PMD_HUGE_PRESENT)) ==
+ (PMD_ISHUGE | PMD_HUGE_PRESENT);
+}
+
#ifdef CONFIG_TRANSPARENT_HUGEPAGE
static inline int pmd_young(pmd_t pmd)
{
@@ -646,12 +650,6 @@
return val >> (PAGE_SHIFT - PMD_PADDR_SHIFT);
}
-static inline int pmd_large(pmd_t pmd)
-{
- return (pmd_val(pmd) & (PMD_ISHUGE | PMD_HUGE_PRESENT)) ==
- (PMD_ISHUGE | PMD_HUGE_PRESENT);
-}
-
static inline int pmd_trans_splitting(pmd_t pmd)
{
return (pmd_val(pmd) & (PMD_ISHUGE|PMD_HUGE_SPLITTING)) ==