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authorVenkatesh Pallipadi <venkatesh.pallipadi@intel.com>2009-07-10 09:57:37 -0700
committerH. Peter Anvin <hpa@zytor.com>2009-08-26 15:41:22 -0700
commit46cf98cdaef5471926010b5bddf84c44ec177fdd (patch)
treee4be7eb533b1d6bb090ceaa8b1a50c0970bf0ef2
parent335ef896d4c6639849d79367f0fef9abc06d121b (diff)
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: Venkatesh Pallipadi <venkatesh.pallipadi@intel.com> Signed-off-by: Suresh Siddha <suresh.b.siddha@intel.com> Signed-off-by: H. Peter Anvin <hpa@zytor.com>
-rw-r--r--arch/ia64/Kconfig4
-rw-r--r--arch/x86/Kconfig4
-rw-r--r--include/linux/page-flags.h4
3 files changed, 10 insertions, 2 deletions
diff --git a/arch/ia64/Kconfig b/arch/ia64/Kconfig
index 170042b420d..e6246119932 100644
--- a/arch/ia64/Kconfig
+++ b/arch/ia64/Kconfig
@@ -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
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c07f7220590..8e159538219 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig
@@ -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
diff --git a/include/linux/page-flags.h b/include/linux/page-flags.h
index e2e5ce54359..2b87acfc5f8 100644
--- a/include/linux/page-flags.h
+++ b/include/linux/page-flags.h
@@ -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)