Commit 46cf98cd authored by Venkatesh Pallipadi's avatar Venkatesh Pallipadi Committed by H. Peter Anvin
Browse files

x86, pat: Generalize the use of page flag PG_uncached 



Only IA64 was using PG_uncached as of now. We now intend to use this bit
in x86 as well, to keep track of memory type of those addresses that
have page struct for them. So, generalize the use of that bit across
ia64 and x86.

Signed-off-by: default avatarVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>
Signed-off-by: default avatarSuresh Siddha <suresh.b.siddha@intel.com>
Signed-off-by: default avatarH. Peter Anvin <hpa@zytor.com>
parent 335ef896

arch/ia64/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -112,6 +112,10 @@ config IA64_UNCACHED_ALLOCATOR 
	bool

	select GENERIC_ALLOCATOR



config ARCH_USES_PG_UNCACHED

	def_bool y

	depends on IA64_UNCACHED_ALLOCATOR



config AUDIT_ARCH

	bool

	default y

arch/x86/Kconfig

+4 −0
Original line number Diff line number Diff line
@@ -1414,6 +1414,10 @@ config X86_PAT 


	  If unsure, say Y.



config ARCH_USES_PG_UNCACHED

	def_bool y

	depends on X86_PAT



config EFI

	bool "EFI runtime service support"

	depends on ACPI

include/linux/page-flags.h

+2 −2
Original line number Diff line number Diff line
@@ -99,7 +99,7 @@ enum pageflags { 
#ifdef CONFIG_HAVE_MLOCKED_PAGE_BIT

	PG_mlocked,		/* Page is vma mlocked */

#endif

#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR

#ifdef CONFIG_ARCH_USES_PG_UNCACHED

	PG_uncached,		/* Page has been mapped as uncached */

#endif

	__NR_PAGEFLAGS,
@@ -257,7 +257,7 @@ PAGEFLAG_FALSE(Mlocked) 
	SETPAGEFLAG_NOOP(Mlocked) TESTCLEARFLAG_FALSE(Mlocked)

#endif



#ifdef CONFIG_IA64_UNCACHED_ALLOCATOR

#ifdef CONFIG_ARCH_USES_PG_UNCACHED

PAGEFLAG(Uncached, uncached)

#else

PAGEFLAG_FALSE(Uncached)

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