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Subject[patch 3/5] remove ptep_test_and_clear_dirty and ptep_clear_flush_dirty.
From: Martin Schwidefsky <schwidefsky@de.ibm.com>

Nobody is using ptep_test_and_clear_dirty and ptep_clear_flush_dirty.
Remove the functions from all architectures.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
---

include/asm-frv/pgtable.h | 8 --------
include/asm-generic/pgtable.h | 25 -------------------------
include/asm-i386/pgtable.h | 21 ---------------------
include/asm-ia64/pgtable.h | 17 -----------------
include/asm-m32r/pgtable.h | 6 ------
include/asm-parisc/pgtable.h | 16 ----------------
include/asm-powerpc/pgtable-ppc32.h | 7 -------
include/asm-powerpc/pgtable-ppc64.h | 31 -------------------------------
include/asm-ppc/pgtable.h | 7 -------
include/asm-s390/pgtable.h | 15 ---------------
include/asm-x86_64/pgtable.h | 8 --------
include/asm-xtensa/pgtable.h | 12 ------------
12 files changed, 173 deletions(-)

diff -urpN linux-2.6/include/asm-frv/pgtable.h linux-2.6-patched/include/asm-frv/pgtable.h
--- linux-2.6/include/asm-frv/pgtable.h 2007-07-02 08:45:46.000000000 +0200
+++ linux-2.6-patched/include/asm-frv/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -394,13 +394,6 @@ static inline pte_t pte_mkdirty(pte_t pt
static inline pte_t pte_mkyoung(pte_t pte) { (pte).pte |= _PAGE_ACCESSED; return pte; }
static inline pte_t pte_mkwrite(pte_t pte) { (pte).pte &= ~_PAGE_WP; return pte; }

-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- int i = test_and_clear_bit(_PAGE_BIT_DIRTY, ptep);
- asm volatile("dcf %M0" :: "U"(*ptep));
- return i;
-}
-
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
int i = test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep);
@@ -510,7 +503,6 @@ static inline int pte_file(pte_t pte)
remap_pfn_range(vma, vaddr, pfn, size, prot)

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
diff -urpN linux-2.6/include/asm-generic/pgtable.h linux-2.6-patched/include/asm-generic/pgtable.h
--- linux-2.6/include/asm-generic/pgtable.h 2007-07-03 12:56:49.000000000 +0200
+++ linux-2.6-patched/include/asm-generic/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -49,31 +49,6 @@
})
#endif

-#ifndef __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define ptep_test_and_clear_dirty(__vma, __address, __ptep) \
-({ \
- pte_t __pte = *__ptep; \
- int r = 1; \
- if (!pte_dirty(__pte)) \
- r = 0; \
- else \
- set_pte_at((__vma)->vm_mm, (__address), (__ptep), \
- pte_mkclean(__pte)); \
- r; \
-})
-#endif
-
-#ifndef __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
-#define ptep_clear_flush_dirty(__vma, __address, __ptep) \
-({ \
- int __dirty; \
- __dirty = ptep_test_and_clear_dirty(__vma, __address, __ptep); \
- if (__dirty) \
- flush_tlb_page(__vma, __address); \
- __dirty; \
-})
-#endif
-
#ifndef __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define ptep_get_and_clear(__mm, __address, __ptep) \
({ \
diff -urpN linux-2.6/include/asm-i386/pgtable.h linux-2.6-patched/include/asm-i386/pgtable.h
--- linux-2.6/include/asm-i386/pgtable.h 2007-07-03 12:56:49.000000000 +0200
+++ linux-2.6-patched/include/asm-i386/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -295,17 +295,6 @@ static inline pte_t native_local_ptep_ge
__changed; \
})

-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define ptep_test_and_clear_dirty(vma, addr, ptep) ({ \
- int __ret = 0; \
- if (pte_dirty(*(ptep))) \
- __ret = test_and_clear_bit(_PAGE_BIT_DIRTY, \
- &(ptep)->pte_low); \
- if (__ret) \
- pte_update((vma)->vm_mm, addr, ptep); \
- __ret; \
-})
-
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define ptep_test_and_clear_young(vma, addr, ptep) ({ \
int __ret = 0; \
@@ -317,16 +306,6 @@ static inline pte_t native_local_ptep_ge
__ret; \
})

-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
-#define ptep_clear_flush_dirty(vma, address, ptep) \
-({ \
- int __dirty; \
- __dirty = ptep_test_and_clear_dirty((vma), (address), (ptep)); \
- if (__dirty) \
- flush_tlb_page(vma, address); \
- __dirty; \
-})
-
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
#define ptep_clear_flush_young(vma, address, ptep) \
({ \
diff -urpN linux-2.6/include/asm-ia64/pgtable.h linux-2.6-patched/include/asm-ia64/pgtable.h
--- linux-2.6/include/asm-ia64/pgtable.h 2007-07-03 12:56:49.000000000 +0200
+++ linux-2.6-patched/include/asm-ia64/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -398,22 +398,6 @@ ptep_test_and_clear_young (struct vm_are
#endif
}

-static inline int
-ptep_test_and_clear_dirty (struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
-#ifdef CONFIG_SMP
- if (!pte_dirty(*ptep))
- return 0;
- return test_and_clear_bit(_PAGE_D_BIT, ptep);
-#else
- pte_t pte = *ptep;
- if (!pte_dirty(pte))
- return 0;
- set_pte_at(vma->vm_mm, addr, ptep, pte_mkclean(pte));
- return 1;
-#endif
-}
-
static inline pte_t
ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
@@ -593,7 +577,6 @@ extern void lazy_mmu_prot_update (pte_t
#endif

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
diff -urpN linux-2.6/include/asm-m32r/pgtable.h linux-2.6-patched/include/asm-m32r/pgtable.h
--- linux-2.6/include/asm-m32r/pgtable.h 2007-05-12 20:16:10.000000000 +0200
+++ linux-2.6-patched/include/asm-m32r/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -284,11 +284,6 @@ static inline pte_t pte_mkwrite(pte_t pt
return pte;
}

-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- return test_and_clear_bit(_PAGE_BIT_DIRTY, ptep);
-}
-
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
return test_and_clear_bit(_PAGE_BIT_ACCESSED, ptep);
@@ -382,7 +377,6 @@ static inline void pmd_set(pmd_t * pmdp,
remap_pfn_range(vma, vaddr, pfn, size, prot)

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
diff -urpN linux-2.6/include/asm-parisc/pgtable.h linux-2.6-patched/include/asm-parisc/pgtable.h
--- linux-2.6/include/asm-parisc/pgtable.h 2007-05-09 09:58:15.000000000 +0200
+++ linux-2.6-patched/include/asm-parisc/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -451,21 +451,6 @@ static inline int ptep_test_and_clear_yo
#endif
}

-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
-#ifdef CONFIG_SMP
- if (!pte_dirty(*ptep))
- return 0;
- return test_and_clear_bit(xlate_pabit(_PAGE_DIRTY_BIT), &pte_val(*ptep));
-#else
- pte_t pte = *ptep;
- if (!pte_dirty(pte))
- return 0;
- set_pte_at(vma->vm_mm, addr, ptep, pte_mkclean(pte));
- return 1;
-#endif
-}
-
extern spinlock_t pa_dbit_lock;

struct mm_struct;
@@ -533,7 +518,6 @@ static inline void ptep_set_wrprotect(st
#define HAVE_ARCH_UNMAPPED_AREA

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTE_SAME
diff -urpN linux-2.6/include/asm-powerpc/pgtable-ppc32.h linux-2.6-patched/include/asm-powerpc/pgtable-ppc32.h
--- linux-2.6/include/asm-powerpc/pgtable-ppc32.h 2007-06-18 09:43:22.000000000 +0200
+++ linux-2.6-patched/include/asm-powerpc/pgtable-ppc32.h 2007-07-03 12:56:49.000000000 +0200
@@ -643,13 +643,6 @@ static inline int __ptep_test_and_clear_
#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
__ptep_test_and_clear_young((__vma)->vm_mm->context.id, __addr, __ptep)

-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
-{
- return (pte_update(ptep, (_PAGE_DIRTY | _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0;
-}
-
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
diff -urpN linux-2.6/include/asm-powerpc/pgtable-ppc64.h linux-2.6-patched/include/asm-powerpc/pgtable-ppc64.h
--- linux-2.6/include/asm-powerpc/pgtable-ppc64.h 2007-06-18 09:43:22.000000000 +0200
+++ linux-2.6-patched/include/asm-powerpc/pgtable-ppc64.h 2007-07-03 12:56:49.000000000 +0200
@@ -307,29 +307,6 @@ static inline int __ptep_test_and_clear_
__r; \
})

-/*
- * On RW/DIRTY bit transitions we can avoid flushing the hpte. For the
- * moment we always flush but we need to fix hpte_update and test if the
- * optimisation is worth it.
- */
-static inline int __ptep_test_and_clear_dirty(struct mm_struct *mm,
- unsigned long addr, pte_t *ptep)
-{
- unsigned long old;
-
- if ((pte_val(*ptep) & _PAGE_DIRTY) == 0)
- return 0;
- old = pte_update(mm, addr, ptep, _PAGE_DIRTY, 0);
- return (old & _PAGE_DIRTY) != 0;
-}
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define ptep_test_and_clear_dirty(__vma, __addr, __ptep) \
-({ \
- int __r; \
- __r = __ptep_test_and_clear_dirty((__vma)->vm_mm, __addr, __ptep); \
- __r; \
-})
-
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
@@ -357,14 +334,6 @@ static inline void ptep_set_wrprotect(st
__young; \
})

-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
-#define ptep_clear_flush_dirty(__vma, __address, __ptep) \
-({ \
- int __dirty = __ptep_test_and_clear_dirty((__vma)->vm_mm, __address, \
- __ptep); \
- __dirty; \
-})
-
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm,
unsigned long addr, pte_t *ptep)
diff -urpN linux-2.6/include/asm-ppc/pgtable.h linux-2.6-patched/include/asm-ppc/pgtable.h
--- linux-2.6/include/asm-ppc/pgtable.h 2007-06-18 09:43:22.000000000 +0200
+++ linux-2.6-patched/include/asm-ppc/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -664,13 +664,6 @@ static inline int __ptep_test_and_clear_
#define ptep_test_and_clear_young(__vma, __addr, __ptep) \
__ptep_test_and_clear_young((__vma)->vm_mm->context.id, __addr, __ptep)

-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma,
- unsigned long addr, pte_t *ptep)
-{
- return (pte_update(ptep, (_PAGE_DIRTY | _PAGE_HWWRITE), 0) & _PAGE_DIRTY) != 0;
-}
-
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr,
pte_t *ptep)
diff -urpN linux-2.6/include/asm-s390/pgtable.h linux-2.6-patched/include/asm-s390/pgtable.h
--- linux-2.6/include/asm-s390/pgtable.h 2007-07-03 12:56:49.000000000 +0200
+++ linux-2.6-patched/include/asm-s390/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -677,19 +677,6 @@ ptep_clear_flush_young(struct vm_area_st
return ptep_test_and_clear_young(vma, address, ptep);
}

-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- return 0;
-}
-
-static inline int
-ptep_clear_flush_dirty(struct vm_area_struct *vma,
- unsigned long address, pte_t *ptep)
-{
- /* No need to flush TLB; bits are in storage key */
- return ptep_test_and_clear_dirty(vma, address, ptep);
-}
-
static inline pte_t ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
pte_t pte = *ptep;
@@ -947,8 +934,6 @@ extern void memmap_init(unsigned long, i
#define __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
#define __HAVE_ARCH_PTEP_CLEAR_YOUNG_FLUSH
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
-#define __HAVE_ARCH_PTEP_CLEAR_DIRTY_FLUSH
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_CLEAR_FLUSH
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
diff -urpN linux-2.6/include/asm-x86_64/pgtable.h linux-2.6-patched/include/asm-x86_64/pgtable.h
--- linux-2.6/include/asm-x86_64/pgtable.h 2007-06-18 09:43:22.000000000 +0200
+++ linux-2.6-patched/include/asm-x86_64/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -290,13 +290,6 @@ static inline pte_t pte_clrhuge(pte_t pt

struct vm_area_struct;

-static inline int ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
-{
- if (!pte_dirty(*ptep))
- return 0;
- return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte);
-}
-
static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
{
if (!pte_young(*ptep))
@@ -433,7 +426,6 @@ extern int kern_addr_valid(unsigned long
(((o) & (1UL << (__VIRTUAL_MASK_SHIFT-1))) ? ((o) | (~__VIRTUAL_MASK)) : (o))

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
diff -urpN linux-2.6/include/asm-xtensa/pgtable.h linux-2.6-patched/include/asm-xtensa/pgtable.h
--- linux-2.6/include/asm-xtensa/pgtable.h 2006-12-11 10:25:32.000000000 +0100
+++ linux-2.6-patched/include/asm-xtensa/pgtable.h 2007-07-03 12:56:49.000000000 +0200
@@ -270,17 +270,6 @@ ptep_test_and_clear_young(struct vm_area
return 1;
}

-static inline int
-ptep_test_and_clear_dirty(struct vm_area_struct *vma, unsigned long addr,
- pte_t *ptep)
-{
- pte_t pte = *ptep;
- if (!pte_dirty(pte))
- return 0;
- update_pte(ptep, pte_mkclean(pte));
- return 1;
-}
-
static inline pte_t
ptep_get_and_clear(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
{
@@ -421,7 +410,6 @@ typedef pte_t *pte_addr_t;
#endif /* !defined (__ASSEMBLY__) */

#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
-#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_DIRTY
#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
#define __HAVE_ARCH_PTEP_SET_WRPROTECT
#define __HAVE_ARCH_PTEP_MKDIRTY
--
blue skies,
Martin.

"Reality continues to ruin my life." - Calvin.

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