From: Al Viro <viro@ftp.linux.org.uk>
To: torvalds@linux-foundation.org
Cc: linux-kernel@vger.kernel.org, davem@davemloft.net
Subject: [PATCH] make sparc32 PAGE_SHARED a read-mostly variable
Date: Sun, 22 Jul 2007 00:12:41 +0100 [thread overview]
Message-ID: <E1ICO7t-0001yp-RO@ZenIV.linux.org.uk> (raw)
same scheme as for sparc64, same rationale
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
---
arch/sparc/mm/init.c | 3 +++
arch/sparc/mm/srmmu.c | 2 +-
arch/sparc/mm/sun4c.c | 2 +-
include/asm-sparc/pgtable.h | 3 +--
4 files changed, 6 insertions(+), 4 deletions(-)
diff --git a/arch/sparc/mm/init.c b/arch/sparc/mm/init.c
index a532922..a1bef07 100644
--- a/arch/sparc/mm/init.c
+++ b/arch/sparc/mm/init.c
@@ -308,6 +308,9 @@ extern void sun4c_paging_init(void);
extern void srmmu_paging_init(void);
extern void device_scan(void);
+pgprot_t PAGE_SHARED __read_mostly;
+EXPORT_SYMBOL(PAGE_SHARED);
+
void __init paging_init(void)
{
switch(sparc_cpu_model) {
diff --git a/arch/sparc/mm/srmmu.c b/arch/sparc/mm/srmmu.c
index ca26232..17b485f 100644
--- a/arch/sparc/mm/srmmu.c
+++ b/arch/sparc/mm/srmmu.c
@@ -2154,7 +2154,7 @@ void __init ld_mmu_srmmu(void)
BTFIXUPSET_SIMM13(ptrs_per_pgd, SRMMU_PTRS_PER_PGD);
BTFIXUPSET_INT(page_none, pgprot_val(SRMMU_PAGE_NONE));
- BTFIXUPSET_INT(page_shared, pgprot_val(SRMMU_PAGE_SHARED));
+ PAGE_SHARED = pgprot_val(SRMMU_PAGE_SHARED);
BTFIXUPSET_INT(page_copy, pgprot_val(SRMMU_PAGE_COPY));
BTFIXUPSET_INT(page_readonly, pgprot_val(SRMMU_PAGE_RDONLY));
BTFIXUPSET_INT(page_kernel, pgprot_val(SRMMU_PAGE_KERNEL));
diff --git a/arch/sparc/mm/sun4c.c b/arch/sparc/mm/sun4c.c
index bdd835f..a57a366 100644
--- a/arch/sparc/mm/sun4c.c
+++ b/arch/sparc/mm/sun4c.c
@@ -2155,7 +2155,7 @@ void __init ld_mmu_sun4c(void)
BTFIXUPSET_SIMM13(user_ptrs_per_pgd, KERNBASE / SUN4C_PGDIR_SIZE);
BTFIXUPSET_INT(page_none, pgprot_val(SUN4C_PAGE_NONE));
- BTFIXUPSET_INT(page_shared, pgprot_val(SUN4C_PAGE_SHARED));
+ PAGE_SHARED = pgprot_val(SUN4C_PAGE_SHARED);
BTFIXUPSET_INT(page_copy, pgprot_val(SUN4C_PAGE_COPY));
BTFIXUPSET_INT(page_readonly, pgprot_val(SUN4C_PAGE_READONLY));
BTFIXUPSET_INT(page_kernel, pgprot_val(SUN4C_PAGE_KERNEL));
diff --git a/include/asm-sparc/pgtable.h b/include/asm-sparc/pgtable.h
index a55f4c3..2cc235b 100644
--- a/include/asm-sparc/pgtable.h
+++ b/include/asm-sparc/pgtable.h
@@ -46,7 +46,6 @@ BTFIXUPDEF_SIMM13(user_ptrs_per_pgd)
#define pgd_ERROR(e) __builtin_trap()
BTFIXUPDEF_INT(page_none)
-BTFIXUPDEF_INT(page_shared)
BTFIXUPDEF_INT(page_copy)
BTFIXUPDEF_INT(page_readonly)
BTFIXUPDEF_INT(page_kernel)
@@ -66,7 +65,7 @@ BTFIXUPDEF_INT(page_kernel)
#define PTE_SIZE (PTRS_PER_PTE*4)
#define PAGE_NONE __pgprot(BTFIXUP_INT(page_none))
-#define PAGE_SHARED __pgprot(BTFIXUP_INT(page_shared))
+extern pgprot_t PAGE_SHARED;
#define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy))
#define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly))
--
1.5.3.GIT
next reply other threads:[~2007-07-21 23:12 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2007-07-21 23:12 Al Viro [this message]
2007-07-22 2:20 ` [PATCH] make sparc32 PAGE_SHARED a read-mostly variable David Miller
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