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authorToshi Kani <toshi.kani@hp.com>2015-04-14 15:47:20 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2015-04-14 16:49:04 -0700
commit0ddab1d2ed664c85c95488eef569786a84aedf37 (patch)
treeb7f2d24f5ba9e307052833500758e0d7bf10bf53 /arch
parent0f616be120c632c818faaea9adcb8f05a7a8601f (diff)
downloadlinux-0ddab1d2ed664c85c95488eef569786a84aedf37.tar.bz2
lib/ioremap.c: add huge I/O map capability interfaces
Add ioremap_pud_enabled() and ioremap_pmd_enabled(), which return 1 when I/O mappings with pud/pmd are enabled on the kernel. ioremap_huge_init() calls arch_ioremap_pud_supported() and arch_ioremap_pmd_supported() to initialize the capabilities at boot-time. A new kernel option "nohugeiomap" is also added, so that user can disable the huge I/O map capabilities when necessary. Signed-off-by: Toshi Kani <toshi.kani@hp.com> Cc: "H. Peter Anvin" <hpa@zytor.com> Cc: Thomas Gleixner <tglx@linutronix.de> Cc: Ingo Molnar <mingo@redhat.com> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Dave Hansen <dave.hansen@intel.com> Cc: Robert Elliott <Elliott@hp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch')
-rw-r--r--arch/Kconfig3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/Kconfig b/arch/Kconfig
index a9c95d36ba70..c88c23f0a1da 100644
--- a/arch/Kconfig
+++ b/arch/Kconfig
@@ -446,6 +446,9 @@ config HAVE_IRQ_TIME_ACCOUNTING
config HAVE_ARCH_TRANSPARENT_HUGEPAGE
bool
+config HAVE_ARCH_HUGE_VMAP
+ bool
+
config HAVE_ARCH_SOFT_DIRTY
bool