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[PATCH 10 of 36] x86: unify pgd_index

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To: Ingo Molnar <mingo@...>
Cc: LKML <linux-kernel@...>, <x86@...>, xen-devel <xen-devel@...>, Stephen Tweedie <sct@...>, Eduardo Habkost <ehabkost@...>, Mark McLoughlin <markmc@...>
Date: Wednesday, June 25, 2008 - 12:19 am

pgd_index is common for 32 and 64-bit, so move it to a common place.

Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
---
 include/asm-x86/pgtable.h    |   20 ++++++++++++++++++++
 include/asm-x86/pgtable_32.h |   20 --------------------
 include/asm-x86/pgtable_64.h |    3 ---
 3 files changed, 20 insertions(+), 23 deletions(-)

diff --git a/include/asm-x86/pgtable.h b/include/asm-x86/pgtable.h
--- a/include/asm-x86/pgtable.h
+++ b/include/asm-x86/pgtable.h
@@ -357,6 +357,26 @@
 # include "pgtable_64.h"
 #endif
 
+/*
+ * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
+ *
+ * this macro returns the index of the entry in the pgd page which would
+ * control the given virtual address
+ */
+#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
+
+/*
+ * pgd_offset() returns a (pgd_t *)
+ * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
+ */
+#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
+/*
+ * a shortcut which implies the use of the kernel's pgd, instead
+ * of a process's
+ */
+#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
+
+
 #define KERNEL_PGD_BOUNDARY	pgd_index(PAGE_OFFSET)
 #define KERNEL_PGD_PTRS		(PTRS_PER_PGD - KERNEL_PGD_BOUNDARY)
 
diff --git a/include/asm-x86/pgtable_32.h b/include/asm-x86/pgtable_32.h
--- a/include/asm-x86/pgtable_32.h
+++ b/include/asm-x86/pgtable_32.h
@@ -119,26 +119,6 @@
  */
 #define mk_pte(page, pgprot)	pfn_pte(page_to_pfn(page), (pgprot))
 
-/*
- * the pgd page can be thought of an array like this: pgd_t[PTRS_PER_PGD]
- *
- * this macro returns the index of the entry in the pgd page which would
- * control the given virtual address
- */
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-#define pgd_index_k(addr) pgd_index((addr))
-
-/*
- * pgd_offset() returns a (pgd_t *)
- * pgd_index() is used get the offset into the pgd page's array of pgd_t's;
- */
-#define pgd_offset(mm, address) ((mm)->pgd + pgd_index((address)))
-
-/*
- * a shortcut which implies the use of the kernel's pgd, instead
- * of a process's
- */
-#define pgd_offset_k(address) pgd_offset(&init_mm, (address))
 
 static inline int pud_large(pud_t pud) { return 0; }
 
diff --git a/include/asm-x86/pgtable_64.h b/include/asm-x86/pgtable_64.h
--- a/include/asm-x86/pgtable_64.h
+++ b/include/asm-x86/pgtable_64.h
@@ -196,9 +196,6 @@
 #define pgd_page_vaddr(pgd)						\
 	((unsigned long)__va((unsigned long)pgd_val((pgd)) & PTE_MASK))
 #define pgd_page(pgd)		(pfn_to_page(pgd_val((pgd)) >> PAGE_SHIFT))
-#define pgd_index(address) (((address) >> PGDIR_SHIFT) & (PTRS_PER_PGD - 1))
-#define pgd_offset(mm, address)	((mm)->pgd + pgd_index((address)))
-#define pgd_offset_k(address) (init_level4_pgt + pgd_index((address)))
 #define pgd_present(pgd) (pgd_val(pgd) & _PAGE_PRESENT)
 static inline int pgd_large(pgd_t pgd) { return 0; }
 #define mk_kernel_pgd(address) __pgd((address) | _KERNPG_TABLE)


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Messages in current thread:
[PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen sup..., Jeremy Fitzhardinge, (Wed Jun 25, 12:18 am)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Wed Jun 25, 4:03 pm)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Wed Jun 25, 4:12 pm)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Thu Jun 26, 3:02 pm)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Thu Jun 26, 2:25 pm)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Thu Jun 26, 10:28 am)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Thu Jun 26, 10:34 am)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Fri Jun 27, 3:04 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Sun Jun 29, 11:02 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Mon Jun 30, 7:04 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Tue Jul 1, 12:14 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Thu Jul 3, 2:25 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Thu Jul 3, 2:41 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Thu Jul 3, 11:47 am)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Tue Jul 1, 12:10 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Mon Jun 30, 1:57 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Mon Jun 30, 1:17 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Mon Jun 30, 2:36 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Mon Jun 30, 1:32 am)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Fri Jun 27, 12:02 pm)
Re: [Xen-devel] Re: [PATCH 00 of 36] x86/paravirt: groundwor..., Jeremy Fitzhardinge, (Fri Jun 27, 12:25 pm)
Re: [PATCH 00 of 36] x86/paravirt: groundwork for 64-bit Xen..., Jeremy Fitzhardinge, (Wed Jun 25, 7:46 am)
[PATCH 36 of 36] x86_64/paravirt: Make load_gs_index() a par..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
Re: [PATCH 36 of 36] x86_64/paravirt: Make load_gs_index() a..., Jeremy Fitzhardinge, (Wed Jun 25, 7:48 am)
[PATCH 26 of 36] x86_64: Split set_pte_vaddr(), Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 35 of 36] x86_64/paravirt: add adjust_exception_frame, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 04 of 36] x86: remove open-coded save/load segment op..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 25 of 36] x86_64: PSE no longer a hard requirement, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 18 of 36] x86/paravirt: add debugging for missing ope..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 01 of 36] x86: asm-x86/pgtable.h: fix compiler warning, Jeremy Fitzhardinge, (Wed Jun 25, 12:18 am)
[PATCH 32 of 36] Add sysret/sysexit pvops for returning to 3..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 31 of 36] x86_64 pvops: don't restore user rsp within..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 06 of 36] x86_64: use p??_populate() to attach pages ..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 07 of 36] x86_64: unify early_ioremap, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 19 of 36] paravirt_ops: define PARA_INDIRECT for indi..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 28 of 36] Save %fs and %gs before load_TLS() and arch..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 30 of 36] x86/paravirt_ops: split sysret and sysexit, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 21 of 36] x86-64: add FIX_PARAVIRT_BOOTMAP fixmap slot, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 20 of 36] paravirt/x86_64: move __PAGE_OFFSET to leav..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 34 of 36] x86_64: swapgs pvop with a user-stack can n..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 05 of 36] x86_64: use write_gdt_entry in vsyscall_set..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 33 of 36] x86_64: ia32entry: replace privileged instr..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 27 of 36] x86_64: __switch_to(): Move arch_leave_lazy..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 29 of 36] Use __KERNEL_DS as SS when returning to a k..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 24 of 36] x86_64: create small vmemmap mappings if PS..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 10 of 36] x86: unify pgd_index, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 11 of 36] x86: unify mmu_context.h, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 08 of 36] x86_64: Add gate_offset() and gate_segment(..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 09 of 36] x86_64: Use __pgd() on mk_kernel_pgd(), Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 23 of 36] x86_64: adjust mapping of physical pagetabl..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 14 of 36] x86_64: add sync_cmpxchg, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 03 of 36] x86: add memory barriers to wrmsr, Jeremy Fitzhardinge, (Wed Jun 25, 12:18 am)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, Arjan van de Ven, (Wed Jun 25, 12:44 am)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, Jeremy Fitzhardinge, (Wed Jun 25, 5:08 pm)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, Arjan van de Ven, (Wed Jun 25, 6:31 pm)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, H. Peter Anvin, (Wed Jun 25, 7:18 pm)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, Jeremy Fitzhardinge, (Wed Jun 25, 7:37 pm)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, H. Peter Anvin, (Wed Jun 25, 7:42 pm)
Re: [PATCH 03 of 36] x86: add memory barriers to wrmsr, Jeremy Fitzhardinge, (Wed Jun 25, 7:05 pm)
[PATCH 13 of 36] x86_64: add prototype for x86_64_start_kern..., Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 12 of 36] x86_64: replace end_pfn with num_physpages, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 17 of 36] x86: preallocate and prepopulate separately, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 15 of 36] x86: simplify vmalloc_sync_all, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 22 of 36] x86_64: split x86_64_start_kernel, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 16 of 36] x86/paravirt: add a pgd_alloc/free hooks, Jeremy Fitzhardinge, (Wed Jun 25, 12:19 am)
[PATCH 02 of 36] x86: add memory clobber to save/loadsegment, Jeremy Fitzhardinge, (Wed Jun 25, 12:18 am)
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