The patch titled
Subject: sh: drop _PAGE_FILE and pte_file()-related helpers
has been added to the -mm tree. Its filename is
sh-drop-_page_file-and-pte_file-related-helpers.patch
This patch should soon appear at
http://ozlabs.org/~akpm/mmots/broken-out/sh-drop-_page_file-and-pte_file-related-helpers.patch
and later at
http://ozlabs.org/~akpm/mmotm/broken-out/sh-drop-_page_file-and-pte_file-related-helpers.patch
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From: "Kirill A. Shutemov" <kirill.shutemov@xxxxxxxxxxxxxxx>
Subject: sh: drop _PAGE_FILE and pte_file()-related helpers
We've replaced remap_file_pages(2) implementation with emulation. Nobody
creates non-linear mapping anymore.
Signed-off-by: Kirill A. Shutemov <kirill.shutemov@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
arch/sh/include/asm/pgtable_32.h | 30 +++--------------------------
arch/sh/include/asm/pgtable_64.h | 9 --------
2 files changed, 5 insertions(+), 34 deletions(-)
diff -puN arch/sh/include/asm/pgtable_32.h~sh-drop-_page_file-and-pte_file-related-helpers arch/sh/include/asm/pgtable_32.h
--- a/arch/sh/include/asm/pgtable_32.h~sh-drop-_page_file-and-pte_file-related-helpers
+++ a/arch/sh/include/asm/pgtable_32.h
@@ -26,8 +26,6 @@
* and timing control which (together with bit 0) are moved into the
* old-style PTEA on the parts that support it.
*
- * XXX: Leave the _PAGE_FILE and _PAGE_WT overhaul for a rainy day.
- *
* SH-X2 MMUs and extended PTEs
*
* SH-X2 supports an extended mode TLB with split data arrays due to the
@@ -51,7 +49,6 @@
#define _PAGE_PRESENT 0x100 /* V-bit : page is valid */
#define _PAGE_PROTNONE 0x200 /* software: if not present */
#define _PAGE_ACCESSED 0x400 /* software: page referenced */
-#define _PAGE_FILE _PAGE_WT /* software: pagecache or swap? */
#define _PAGE_SPECIAL 0x800 /* software: special page */
#define _PAGE_SZ_MASK (_PAGE_SZ0 | _PAGE_SZ1)
@@ -105,14 +102,13 @@ static inline unsigned long copy_ptea_at
/* Mask which drops unused bits from the PTEL value */
#if defined(CONFIG_CPU_SH3)
#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED| \
- _PAGE_FILE | _PAGE_SZ1 | \
- _PAGE_HW_SHARED)
+ _PAGE_SZ1 | _PAGE_HW_SHARED)
#elif defined(CONFIG_X2TLB)
/* Get rid of the legacy PR/SZ bits when using extended mode */
#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | \
- _PAGE_FILE | _PAGE_PR_MASK | _PAGE_SZ_MASK)
+ _PAGE_PR_MASK | _PAGE_SZ_MASK)
#else
-#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED | _PAGE_FILE)
+#define _PAGE_CLEAR_FLAGS (_PAGE_PROTNONE | _PAGE_ACCESSED)
#endif
#define _PAGE_FLAGS_HARDWARE_MASK (phys_addr_mask() & ~(_PAGE_CLEAR_FLAGS))
@@ -343,7 +339,6 @@ static inline void set_pte(pte_t *ptep,
#define pte_not_present(pte) (!((pte).pte_low & _PAGE_PRESENT))
#define pte_dirty(pte) ((pte).pte_low & _PAGE_DIRTY)
#define pte_young(pte) ((pte).pte_low & _PAGE_ACCESSED)
-#define pte_file(pte) ((pte).pte_low & _PAGE_FILE)
#define pte_special(pte) ((pte).pte_low & _PAGE_SPECIAL)
#ifdef CONFIG_X2TLB
@@ -445,7 +440,6 @@ static inline pte_t pte_modify(pte_t pte
* Encode and de-code a swap entry
*
* Constraints:
- * _PAGE_FILE at bit 0
* _PAGE_PRESENT at bit 8
* _PAGE_PROTNONE at bit 9
*
@@ -453,9 +447,7 @@ static inline pte_t pte_modify(pte_t pte
* swap offset into bits 10:30. For the 64-bit PTE case, we keep the
* preserved bits in the low 32-bits and use the upper 32 as the swap
* offset (along with a 5-bit type), following the same approach as x86
- * PAE. This keeps the logic quite simple, and allows for a full 32
- * PTE_FILE_MAX_BITS, as opposed to the 29-bits we're constrained with
- * in the pte_low case.
+ * PAE. This keeps the logic quite simple.
*
* As is evident by the Alpha code, if we ever get a 64-bit unsigned
* long (swp_entry_t) to match up with the 64-bit PTEs, this all becomes
@@ -471,13 +463,6 @@ static inline pte_t pte_modify(pte_t pte
#define __pte_to_swp_entry(pte) ((swp_entry_t){ (pte).pte_high })
#define __swp_entry_to_pte(x) ((pte_t){ 0, (x).val })
-/*
- * Encode and decode a nonlinear file mapping entry
- */
-#define pte_to_pgoff(pte) ((pte).pte_high)
-#define pgoff_to_pte(off) ((pte_t) { _PAGE_FILE, (off) })
-
-#define PTE_FILE_MAX_BITS 32
#else
#define __swp_type(x) ((x).val & 0xff)
#define __swp_offset(x) ((x).val >> 10)
@@ -485,13 +470,6 @@ static inline pte_t pte_modify(pte_t pte
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) >> 1 })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val << 1 })
-
-/*
- * Encode and decode a nonlinear file mapping entry
- */
-#define PTE_FILE_MAX_BITS 29
-#define pte_to_pgoff(pte) (pte_val(pte) >> 1)
-#define pgoff_to_pte(off) ((pte_t) { ((off) << 1) | _PAGE_FILE })
#endif
#endif /* __ASSEMBLY__ */
diff -puN arch/sh/include/asm/pgtable_64.h~sh-drop-_page_file-and-pte_file-related-helpers arch/sh/include/asm/pgtable_64.h
--- a/arch/sh/include/asm/pgtable_64.h~sh-drop-_page_file-and-pte_file-related-helpers
+++ a/arch/sh/include/asm/pgtable_64.h
@@ -107,7 +107,6 @@ static __inline__ void set_pte(pte_t *pt
#define _PAGE_DEVICE 0x001 /* CB0: if uncacheable, 1->device (i.e. no write-combining or reordering at bus level) */
#define _PAGE_CACHABLE 0x002 /* CB1: uncachable/cachable */
#define _PAGE_PRESENT 0x004 /* software: page referenced */
-#define _PAGE_FILE 0x004 /* software: only when !present */
#define _PAGE_SIZE0 0x008 /* SZ0-bit : size of page */
#define _PAGE_SIZE1 0x010 /* SZ1-bit : size of page */
#define _PAGE_SHARED 0x020 /* software: reflects PTEH's SH */
@@ -129,7 +128,7 @@ static __inline__ void set_pte(pte_t *pt
#define _PAGE_WIRED _PAGE_EXT(0x001) /* software: wire the tlb entry */
#define _PAGE_SPECIAL _PAGE_EXT(0x002)
-#define _PAGE_CLEAR_FLAGS (_PAGE_PRESENT | _PAGE_FILE | _PAGE_SHARED | \
+#define _PAGE_CLEAR_FLAGS (_PAGE_PRESENT | _PAGE_SHARED | \
_PAGE_DIRTY | _PAGE_ACCESSED | _PAGE_WIRED)
/* Mask which drops software flags */
@@ -260,7 +259,6 @@ static __inline__ void set_pte(pte_t *pt
*/
static inline int pte_dirty(pte_t pte) { return pte_val(pte) & _PAGE_DIRTY; }
static inline int pte_young(pte_t pte) { return pte_val(pte) & _PAGE_ACCESSED; }
-static inline int pte_file(pte_t pte) { return pte_val(pte) & _PAGE_FILE; }
static inline int pte_write(pte_t pte) { return pte_val(pte) & _PAGE_WRITE; }
static inline int pte_special(pte_t pte){ return pte_val(pte) & _PAGE_SPECIAL; }
@@ -304,11 +302,6 @@ static inline pte_t pte_modify(pte_t pte
#define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) })
#define __swp_entry_to_pte(x) ((pte_t) { (x).val })
-/* Encode and decode a nonlinear file mapping entry */
-#define PTE_FILE_MAX_BITS 29
-#define pte_to_pgoff(pte) (pte_val(pte))
-#define pgoff_to_pte(off) ((pte_t) { (off) | _PAGE_FILE })
-
#endif /* !__ASSEMBLY__ */
#define pfn_pte(pfn, prot) __pte(((pfn) << PAGE_SHIFT) | pgprot_val(prot))
_
Patches currently in -mm which might be from kirill.shutemov@xxxxxxxxxxxxxxx are
mm-protect-set_page_dirty-from-ongoing-truncation.patch
mm-replace-remap_file_pages-syscall-with-emulation.patch
mm-drop-support-of-non-linear-mapping-from-unmap-zap-codepath.patch
mm-drop-support-of-non-linear-mapping-from-fault-codepath.patch
mm-drop-vm_ops-remap_pages-and-generic_file_remap_pages-stub.patch
proc-drop-handling-non-linear-mappings.patch
rmap-drop-support-of-non-linear-mappings.patch
mm-replace-vma-shareadlinear-with-vma-shared.patch
mm-remove-rest-usage-of-vm_nonlinear-and-pte_file.patch
asm-generic-drop-unused-pte_file-helpers.patch
alpha-drop-_page_file-and-pte_file-related-helpers.patch
arc-drop-_page_file-and-pte_file-related-helpers.patch
arm64-drop-pte_file-and-pte_file-related-helpers.patch
arm-drop-l_pte_file-and-pte_file-related-helpers.patch
avr32-drop-_page_file-and-pte_file-related-helpers.patch
blackfin-drop-pte_file.patch
c6x-drop-pte_file.patch
cris-drop-_page_file-and-pte_file-related-helpers.patch
frv-drop-_page_file-and-pte_file-related-helpers.patch
hexagon-drop-_page_file-and-pte_file-related-helpers.patch
ia64-drop-_page_file-and-pte_file-related-helpers.patch
m32r-drop-_page_file-and-pte_file-related-helpers.patch
m68k-drop-_page_file-and-pte_file-related-helpers.patch
metag-drop-_page_file-and-pte_file-related-helpers.patch
microblaze-drop-_page_file-and-pte_file-related-helpers.patch
mips-drop-_page_file-and-pte_file-related-helpers.patch
mn10300-drop-_page_file-and-pte_file-related-helpers.patch
nios2-drop-_page_file-and-pte_file-related-helpers.patch
openrisc-drop-_page_file-and-pte_file-related-helpers.patch
parisc-drop-_page_file-and-pte_file-related-helpers.patch
powerpc-drop-_page_file-and-pte_file-related-helpers.patch
s390-drop-pte_file-related-helpers.patch
score-drop-_page_file-and-pte_file-related-helpers.patch
sh-drop-_page_file-and-pte_file-related-helpers.patch
sparc-drop-pte_file-related-helpers.patch
tile-drop-pte_file-related-helpers.patch
um-drop-_page_file-and-pte_file-related-helpers.patch
unicore32-drop-pte_file-related-helpers.patch
x86-drop-_page_file-and-pte_file-related-helpers.patch
xtensa-drop-_page_file-and-pte_file-related-helpers.patch
mm-memory-remove-vm_file-check-on-shared-writable-vmas.patch
mm-memory-merge-shared-writable-dirtying-branches-in-do_wp_page.patch
mm-add-fields-for-compound-destructor-and-order-into-struct-page.patch
mm-add-vm_bug_on_page-for-page_mapcount.patch
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