[patch 09/26] Xen-paravirt_ops: remove HAVE_ARCH_MM_LIFETIME, define no-op architecture implementations

From: Jeremy Fitzhardinge
Date: Thu Mar 01 2007 - 18:58:07 EST

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akpm:
> Can we lose __HAVE_ARCH_MM_LIFETIME? Just define these (preferably in C,
> not in cpp) in the appropriate include/asm-foo/ files?

Signed-off-by: Jeremy Fitzhardinge <jeremy@xxxxxxxxxxxxx>
Cc: linux-arch@xxxxxxxxxxxxxxx
Cc: James Bottomley <James.Bottomley@xxxxxxxxxxxx>

---
include/asm-alpha/mmu_context.h | 1 +
include/asm-arm/mmu_context.h | 1 +
include/asm-arm26/mmu_context.h | 2 ++
include/asm-avr32/mmu_context.h | 1 +
include/asm-cris/mmu_context.h | 2 ++
include/asm-frv/mmu_context.h | 1 +
include/asm-generic/mm_hooks.h | 18 ++++++++++++++++++
include/asm-h8300/mmu_context.h | 1 +
include/asm-i386/mmu_context.h | 11 ++++++++++-
include/asm-i386/paravirt.h | 5 ++---
include/asm-ia64/mmu_context.h | 1 +
include/asm-m32r/mmu_context.h | 1 +
include/asm-m68k/mmu_context.h | 1 +
include/asm-m68knommu/mmu_context.h | 1 +
include/asm-mips/mmu_context.h | 1 +
include/asm-parisc/mmu_context.h | 1 +
include/asm-powerpc/mmu_context.h | 1 +
include/asm-ppc/mmu_context.h | 1 +
include/asm-s390/mmu_context.h | 2 ++
include/asm-sh/mmu_context.h | 1 +
include/asm-sh64/mmu_context.h | 2 +-
include/asm-sparc/mmu_context.h | 2 ++
include/asm-sparc64/mmu_context.h | 1 +
include/asm-um/mmu_context.h | 2 ++
include/asm-v850/mmu_context.h | 2 ++
include/asm-x86_64/mmu_context.h | 1 +
include/asm-xtensa/mmu_context.h | 1 +
include/linux/sched.h | 6 ------
mm/mmap.c | 1 +
29 files changed, 61 insertions(+), 11 deletions(-)

===================================================================
--- a/include/asm-alpha/mmu_context.h
+++ b/include/asm-alpha/mmu_context.h
@@ -10,6 +10,7 @@
#include <asm/system.h>
#include <asm/machvec.h>
#include <asm/compiler.h>
+#include <asm-generic/mm_hooks.h>

/*
* Force a context reload. This is needed when we change the page
===================================================================
--- a/include/asm-arm/mmu_context.h
+++ b/include/asm-arm/mmu_context.h
@@ -16,6 +16,7 @@
#include <linux/compiler.h>
#include <asm/cacheflush.h>
#include <asm/proc-fns.h>
+#include <asm-generic/mm_hooks.h>

void __check_kvm_seq(struct mm_struct *mm);

===================================================================
--- a/include/asm-arm26/mmu_context.h
+++ b/include/asm-arm26/mmu_context.h
@@ -12,6 +12,8 @@
*/
#ifndef __ASM_ARM_MMU_CONTEXT_H
#define __ASM_ARM_MMU_CONTEXT_H
+
+#include <asm-generic/mm_hooks.h>

#define init_new_context(tsk,mm) 0
#define destroy_context(mm) do { } while(0)
===================================================================
--- a/include/asm-avr32/mmu_context.h
+++ b/include/asm-avr32/mmu_context.h
@@ -15,6 +15,7 @@
#include <asm/tlbflush.h>
#include <asm/pgalloc.h>
#include <asm/sysreg.h>
+#include <asm-generic/mm_hooks.h>

/*
* The MMU "context" consists of two things:
===================================================================
--- a/include/asm-cris/mmu_context.h
+++ b/include/asm-cris/mmu_context.h
@@ -1,5 +1,7 @@
#ifndef __CRIS_MMU_CONTEXT_H
#define __CRIS_MMU_CONTEXT_H
+
+#include <asm-generic/mm_hooks.h>

extern int init_new_context(struct task_struct *tsk, struct mm_struct *mm);
extern void get_mmu_context(struct mm_struct *mm);
===================================================================
--- a/include/asm-frv/mmu_context.h
+++ b/include/asm-frv/mmu_context.h
@@ -15,6 +15,7 @@
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- /dev/null
+++ b/include/asm-generic/mm_hooks.h
@@ -0,0 +1,18 @@
+/*
+ * Define generic no-op hooks for arch_dup_mmap and arch_exit_mmap, to
+ * be included in asm-FOO/mmu_context.h for any arch FOO which doesn't
+ * need to hook these.
+ */
+#ifndef _ASM_GENERIC_MM_HOOKS_H
+#define _ASM_GENERIC_MM_HOOKS_H
+
+static inline void arch_dup_mmap(struct mm_struct *oldmm,
+ struct mm_struct *mm)
+{
+}
+
+static inline void arch_exit_mmap(struct mm_struct *mm)
+{
+}
+
+#endif /* _ASM_GENERIC_MM_HOOKS_H */
===================================================================
--- a/include/asm-h8300/mmu_context.h
+++ b/include/asm-h8300/mmu_context.h
@@ -4,6 +4,7 @@
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-i386/mmu_context.h
+++ b/include/asm-i386/mmu_context.h
@@ -6,6 +6,15 @@
#include <asm/pgalloc.h>
#include <asm/tlbflush.h>
#include <asm/paravirt.h>
+#ifndef CONFIG_PARAVIRT
+#include <asm-generic/mm_hooks.h>
+
+static inline void paravirt_activate_mm(struct mm_struct *prev,
+ struct mm_struct *next)
+{
+}
+#endif /* !CONFIG_PARAVIRT */
+

/*
* Used for LDT copy/destruction.
@@ -68,7 +77,7 @@ static inline void switch_mm(struct mm_s

#define activate_mm(prev, next) \
do { \
- arch_activate_mm(prev, next); \
+ paravirt_activate_mm(prev, next); \
switch_mm((prev),(next),NULL); \
} while(0);

===================================================================
--- a/include/asm-i386/paravirt.h
+++ b/include/asm-i386/paravirt.h
@@ -403,9 +403,8 @@ static inline void startup_ipi_hook(int
}
#endif

-#define __HAVE_ARCH_MM_LIFETIME
-static inline void arch_activate_mm(struct mm_struct *prev,
- struct mm_struct *next)
+static inline void paravirt_activate_mm(struct mm_struct *prev,
+ struct mm_struct *next)
{
paravirt_ops.activate_mm(prev, next);
}
===================================================================
--- a/include/asm-ia64/mmu_context.h
+++ b/include/asm-ia64/mmu_context.h
@@ -29,6 +29,7 @@
#include <linux/spinlock.h>

#include <asm/processor.h>
+#include <asm-generic/mm_hooks.h>

struct ia64_ctx {
spinlock_t lock;
===================================================================
--- a/include/asm-m32r/mmu_context.h
+++ b/include/asm-m32r/mmu_context.h
@@ -15,6 +15,7 @@
#include <asm/pgalloc.h>
#include <asm/mmu.h>
#include <asm/tlbflush.h>
+#include <asm-generic/mm_hooks.h>

/*
* Cache of MMU context last used.
===================================================================
--- a/include/asm-m68k/mmu_context.h
+++ b/include/asm-m68k/mmu_context.h
@@ -1,6 +1,7 @@
#ifndef __M68K_MMU_CONTEXT_H
#define __M68K_MMU_CONTEXT_H

+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-m68knommu/mmu_context.h
+++ b/include/asm-m68knommu/mmu_context.h
@@ -4,6 +4,7 @@
#include <asm/setup.h>
#include <asm/page.h>
#include <asm/pgalloc.h>
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-mips/mmu_context.h
+++ b/include/asm-mips/mmu_context.h
@@ -20,6 +20,7 @@
#include <asm/mipsmtregs.h>
#include <asm/smtc.h>
#endif /* SMTC */
+#include <asm-generic/mm_hooks.h>

/*
* For the fast tlb miss handlers, we keep a per cpu array of pointers
===================================================================
--- a/include/asm-parisc/mmu_context.h
+++ b/include/asm-parisc/mmu_context.h
@@ -5,6 +5,7 @@
#include <asm/atomic.h>
#include <asm/pgalloc.h>
#include <asm/pgtable.h>
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-powerpc/mmu_context.h
+++ b/include/asm-powerpc/mmu_context.h
@@ -10,6 +10,7 @@
#include <linux/mm.h>
#include <asm/mmu.h>
#include <asm/cputable.h>
+#include <asm-generic/mm_hooks.h>

/*
* Copyright (C) 2001 PPC 64 Team, IBM Corp
===================================================================
--- a/include/asm-ppc/mmu_context.h
+++ b/include/asm-ppc/mmu_context.h
@@ -6,6 +6,7 @@
#include <asm/bitops.h>
#include <asm/mmu.h>
#include <asm/cputable.h>
+#include <asm-generic/mm_hooks.h>

/*
* On 32-bit PowerPC 6xx/7xx/7xxx CPUs, we use a set of 16 VSIDs
===================================================================
--- a/include/asm-s390/mmu_context.h
+++ b/include/asm-s390/mmu_context.h
@@ -10,6 +10,8 @@
#define __S390_MMU_CONTEXT_H

#include <asm/pgalloc.h>
+#include <asm-generic/mm_hooks.h>
+
/*
* get a new mmu context.. S390 don't know about contexts.
*/
===================================================================
--- a/include/asm-sh/mmu_context.h
+++ b/include/asm-sh/mmu_context.h
@@ -12,6 +12,7 @@
#include <asm/tlbflush.h>
#include <asm/uaccess.h>
#include <asm/io.h>
+#include <asm-generic/mm_hooks.h>

/*
* The MMU "context" consists of two things:
===================================================================
--- a/include/asm-sh64/mmu_context.h
+++ b/include/asm-sh64/mmu_context.h
@@ -27,7 +27,7 @@ extern unsigned long mmu_context_cache;
extern unsigned long mmu_context_cache;

#include <asm/page.h>
-
+#include <asm-generic/mm_hooks.h>

/* Current mm's pgd */
extern pgd_t *mmu_pdtp_cache;
===================================================================
--- a/include/asm-sparc/mmu_context.h
+++ b/include/asm-sparc/mmu_context.h
@@ -4,6 +4,8 @@
#include <asm/btfixup.h>

#ifndef __ASSEMBLY__
+
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-sparc64/mmu_context.h
+++ b/include/asm-sparc64/mmu_context.h
@@ -9,6 +9,7 @@
#include <linux/spinlock.h>
#include <asm/system.h>
#include <asm/spitfire.h>
+#include <asm-generic/mm_hooks.h>

static inline void enter_lazy_tlb(struct mm_struct *mm, struct task_struct *tsk)
{
===================================================================
--- a/include/asm-um/mmu_context.h
+++ b/include/asm-um/mmu_context.h
@@ -5,6 +5,8 @@

#ifndef __UM_MMU_CONTEXT_H
#define __UM_MMU_CONTEXT_H
+
+#include <asm-generic/mm_hooks.h>

#include "linux/sched.h"
#include "choose-mode.h"
===================================================================
--- a/include/asm-v850/mmu_context.h
+++ b/include/asm-v850/mmu_context.h
@@ -1,5 +1,7 @@
#ifndef __V850_MMU_CONTEXT_H__
#define __V850_MMU_CONTEXT_H__
+
+#include <asm-generic/mm_hooks.h>

#define destroy_context(mm) ((void)0)
#define init_new_context(tsk,mm) 0
===================================================================
--- a/include/asm-x86_64/mmu_context.h
+++ b/include/asm-x86_64/mmu_context.h
@@ -7,6 +7,7 @@
#include <asm/pda.h>
#include <asm/pgtable.h>
#include <asm/tlbflush.h>
+#include <asm-generic/mm_hooks.h>

/*
* possibly do the LDT unload here?
===================================================================
--- a/include/asm-xtensa/mmu_context.h
+++ b/include/asm-xtensa/mmu_context.h
@@ -18,6 +18,7 @@
#include <asm/pgtable.h>
#include <asm/cacheflush.h>
#include <asm/tlbflush.h>
+#include <asm-generic/mm_hooks.h>

#define XCHAL_MMU_ASID_BITS 8

===================================================================
--- a/include/linux/sched.h
+++ b/include/linux/sched.h
@@ -374,12 +374,6 @@ struct mm_struct {
rwlock_t ioctx_list_lock;
struct kioctx *ioctx_list;
};
-
-#ifndef __HAVE_ARCH_MM_LIFETIME
-#define arch_activate_mm(prev, next) do {} while(0)
-#define arch_dup_mmap(oldmm, mm) do {} while(0)
-#define arch_exit_mmap(mm) do {} while(0)
-#endif

struct sighand_struct {
atomic_t count;
===================================================================
--- a/mm/mmap.c
+++ b/mm/mmap.c
@@ -29,6 +29,7 @@
#include <asm/uaccess.h>
#include <asm/cacheflush.h>
#include <asm/tlb.h>
+#include <asm/mmu_context.h>

#ifndef arch_mmap_check
#define arch_mmap_check(addr, len, flags) (0)

--

-
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