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Trivial pgtable.h __ASSEMBLY__ move

PATCH New Rusty Russell 1 participant 4 messages Aug 3, 2006 Generic include/asm header files

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Rusty Russell

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#0 lore raw

PATCH 1/4 Trivial pgtable.h __ASSEMBLY__ move

[ Set of trivial cleanups taken from paravirt_ops work, please merge ]

Parsing generic pgtable.h in assembler is simply crazy. None of this file is needed in assembler code, and C inline functions and structures routine break one or more different compiles.

Signed-off-by Zachary Amsden <[email protected]>
Signed-off-by Rusty Russell <[email protected]>
include/asm-generic/pgtable.h +2 -1
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal linux-2.6.18-rc2-mm1/include/asm-generic/pgtable.h working-2.6.18-rc2-mm1-zach-1/include/asm-generic/pgtable.h
@@ -1,6 +1,8 @@
 #ifndef _ASM_GENERIC_PGTABLE_H
 #define _ASM_GENERIC_PGTABLE_H
 
+#ifndef __ASSEMBLY__
+
 #ifndef __HAVE_ARCH_PTEP_ESTABLISH
 /*
  * Establish a new mapping:

@@ -188,7 +190,6 @@ static inline void ptep_set_wrprotect(st
 })
 #endif
 
-#ifndef __ASSEMBLY__
 /*
  * When walking page tables, we usually want to skip any p?d_none entries;
  * and any p?d_bad entries - reporting the error before resetting to none.
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#1 lore raw

PATCH 2/4 Trivial move of __HAVE macros in i386 pagetable headers

Move the __HAVE_ARCH_PTEP defines to accompany the function definitions. Anything else is just a complete nightmare to track through the 2/3-level paging code, and this caused duplicate definitions to be needed (pte_same), which could have easily been taken care of with the asm-generic pgtable functions.

Signed-off-by Zachary Amsden <[email protected]>
Signed-off-by Rusty Russell <[email protected]>
include/asm-i386/pgtable-2level.h +2 -1
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-2.6.18-rc2-mm1-zach-1/include/asm-i386/pgtable-2level.h working-2.6.18-rc2-mm1-zach-2/include/asm-i386/pgtable-2level.h
@@ -21,8 +21,9 @@
 #define pte_clear(mm,addr,xp)	do { set_pte_at(mm, addr, xp, __pte(0)); } while (0)
 #define pmd_clear(xp)	do { set_pmd(xp, __pmd(0)); } while (0)
 
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR
 #define ptep_get_and_clear(mm,addr,xp)	__pte(xchg(&(xp)->pte_low, 0))
-#define pte_same(a, b)		((a).pte_low == (b).pte_low)
+
 #define pte_page(x)		pfn_to_page(pte_pfn(x))
 #define pte_none(x)		(!(x).pte_low)
 #define pte_pfn(x)		((unsigned long)(((x).pte_low >> PAGE_SHIFT)))
include/asm-i386/pgtable-3level.h +2 -0
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-2.6.18-rc2-mm1-zach-1/include/asm-i386/pgtable-3level.h working-2.6.18-rc2-mm1-zach-2/include/asm-i386/pgtable-3level.h
@@ -105,6 +105,7 @@ static inline void pmd_clear(pmd_t *pmd)
 	*(tmp + 1) = 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)
 {
 	pte_t res;

@@ -117,6 +118,7 @@ static inline pte_t ptep_get_and_clear(s
 	return res;
 }
 
+#define __HAVE_ARCH_PTE_SAME
 static inline int pte_same(pte_t a, pte_t b)
 {
 	return a.pte_low == b.pte_low && a.pte_high == b.pte_high;
include/asm-i386/pgtable.h +4 -6
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-2.6.18-rc2-mm1-zach-1/include/asm-i386/pgtable.h working-2.6.18-rc2-mm1-zach-2/include/asm-i386/pgtable.h
@@ -246,6 +246,7 @@ static inline pte_t pte_mkhuge(pte_t pte
 # include <asm/pgtable-2level.h>
 #endif
 
+#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)
 {
 	if (!pte_dirty(*ptep))

@@ -253,6 +254,7 @@ static inline int ptep_test_and_clear_di
 	return test_and_clear_bit(_PAGE_BIT_DIRTY, &ptep->pte_low);
 }
 
+#define __HAVE_ARCH_PTEP_TEST_AND_CLEAR_YOUNG
 static inline int ptep_test_and_clear_young(struct vm_area_struct *vma, unsigned long addr, pte_t *ptep)
 {
 	if (!pte_young(*ptep))

@@ -260,6 +262,7 @@ static inline int ptep_test_and_clear_yo
 	return test_and_clear_bit(_PAGE_BIT_ACCESSED, &ptep->pte_low);
 }
 
+#define __HAVE_ARCH_PTEP_GET_AND_CLEAR_FULL
 static inline pte_t ptep_get_and_clear_full(struct mm_struct *mm, unsigned long addr, pte_t *ptep, int full)
 {
 	pte_t pte;

@@ -272,6 +275,7 @@ static inline pte_t ptep_get_and_clear_f
 	return pte;
 }
 
+#define __HAVE_ARCH_PTEP_SET_WRPROTECT
 static inline void ptep_set_wrprotect(struct mm_struct *mm, unsigned long addr, pte_t *ptep)
 {
 	clear_bit(_PAGE_BIT_RW, &ptep->pte_low);

@@ -441,12 +445,6 @@ extern void noexec_setup(const char *str
 #define GET_IOSPACE(pfn)		0
 #define GET_PFN(pfn)			(pfn)
 
-#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
-#define __HAVE_ARCH_PTE_SAME
 #include <asm-generic/pgtable.h>
 
 #endif /* _I386_PGTABLE_H */
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#2 lore raw

PATCH 3/4 Trivial move of ptep_set_access_flags

Move ptep_set_access_flags to be closer to the other ptep accessors, and make the indentation standard.

Signed-off-by Zachary Amsden <[email protected]>
Signed-off-by Rusty Russell <[email protected]>
include/asm-i386/pgtable.h +16 -15
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-2.6.18-rc2-mm1-zach-2/include/asm-i386/pgtable.h working-2.6.18-rc2-mm1-zach-3/include/asm-i386/pgtable.h
@@ -246,6 +246,22 @@ static inline pte_t pte_mkhuge(pte_t pte
 # include <asm/pgtable-2level.h>
 #endif
 
+/*
+ * We only update the dirty/accessed state if we set
+ * the dirty bit by hand in the kernel, since the hardware
+ * will do the accessed bit for us, and we don't want to
+ * race with other CPU's that might be updating the dirty
+ * bit at the same time.
+ */
+#define  __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
+#define ptep_set_access_flags(vma, address, ptep, entry, dirty)		\
+do {									\
+	if (dirty) {							\
+		(ptep)->pte_low = (entry).pte_low;			\
+		flush_tlb_page(vma, address);				\
+	}								\
+} while (0)
+
 #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)
 {

@@ -415,23 +431,8 @@ extern void noexec_setup(const char *str
 /*
  * The i386 doesn't have any external MMU info: the kernel page
  * tables contain all the necessary information.
- *
- * Also, we only update the dirty/accessed state if we set
- * the dirty bit by hand in the kernel, since the hardware
- * will do the accessed bit for us, and we don't want to
- * race with other CPU's that might be updating the dirty
- * bit at the same time.
  */
 #define update_mmu_cache(vma,address,pte) do { } while (0)
-#define  __HAVE_ARCH_PTEP_SET_ACCESS_FLAGS
-#define ptep_set_access_flags(__vma, __address, __ptep, __entry, __dirty) \
-	do {								  \
-		if (__dirty) {						  \
-			(__ptep)->pte_low = (__entry).pte_low;	  	  \
-			flush_tlb_page(__vma, __address);		  \
-		}							  \
-	} while (0)
-
 #endif /* !__ASSEMBLY__ */
 
 #ifdef CONFIG_FLATMEM
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#3 lore raw

PATCH 4/4 Remove unused include from efi_stub.S

Remove unnecessary include from efi_stub.S

Signed-off-by Zachary Amsden <[email protected]>
Signed-off-by Rusty Russell <[email protected]>
arch/i386/kernel/efi_stub.S +0 -1
diff -urpN --exclude TAGS -X /home/rusty/devel/kernel/kernel-patches/current-dontdiff --minimal working-2.6.18-rc2-mm1-zach-3/arch/i386/kernel/efi_stub.S working-2.6.18-rc2-mm1-zach-4/arch/i386/kernel/efi_stub.S
@@ -7,7 +7,6 @@
 
 #include <linux/linkage.h>
 #include <asm/page.h>
-#include <asm/pgtable.h>
 
 /*
  * efi_call_phys(void *, ...) is a function with variable parameters.
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