Commit 378e515c authored by Al Viro's avatar Al Viro Committed by David S. Miller
Browse files

[SPARC32]: Make PAGE_SHARED a read-mostly variable. 



same scheme as for sparc64, same rationale

Signed-off-by: default avatarAl Viro <viro@zeniv.linux.org.uk>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 0f516813

arch/sparc/mm/init.c

+3 −0
Original line number Diff line number Diff line
@@ -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) {

arch/sparc/mm/srmmu.c

+1 −1
Original line number Diff line number Diff line
@@ -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));

arch/sparc/mm/sun4c.c

+1 −1
Original line number Diff line number Diff line
@@ -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));

include/asm-sparc/pgtable.h

+1 −2
Original line number Diff line number Diff line
@@ -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))