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| author |   Gerald Schaefer <gerald.schaefer@de.ibm.com> | 2012-10-08 16:30:04 -0700 |
|---|---|---|
| committer |   Linus Torvalds <torvalds@linux-foundation.org> | 2012-10-09 16:22:29 +0900 |
| commit | 15626062f4a98279c59a2a5208c496cf65cbf8c0 (patch) | |
| tree | 793c32816204cc879c1c80065c5cc24789ab4b3b | |
| parent | mm: fix potential anon_vma locking issue in mprotect() (diff) | |
| download | linux-dev-15626062f4a98279c59a2a5208c496cf65cbf8c0.tar.xz linux-dev-15626062f4a98279c59a2a5208c496cf65cbf8c0.zip | |
thp, x86: introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE
Cleanup patch in preparation for transparent hugepage support on s390.
Adding new architectures to the TRANSPARENT_HUGEPAGE config option can
make the "depends" line rather ugly, like "depends on (X86 || (S390 &&
64BIT)) && MMU".
This patch adds a HAVE_ARCH_TRANSPARENT_HUGEPAGE instead. x86 already has
MMU "def_bool y", so the MMU check is superfluous there and
HAVE_ARCH_TRANSPARENT_HUGEPAGE can be selected in arch/x86/Kconfig.
Signed-off-by: Gerald Schaefer <gerald.schaefer@de.ibm.com>
Cc: Ingo Molnar <mingo@kernel.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: "H. Peter Anvin" <hpa@zytor.com>
Cc: Andrea Arcangeli <aarcange@redhat.com>
Cc: Andi Kleen <ak@linux.intel.com>
Cc: Hugh Dickins <hughd@google.com>
Cc: Hillf Danton <dhillf@gmail.com>
Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
| -rw-r--r-- | arch/Kconfig | 3 | ||||
| -rw-r--r-- | arch/x86/Kconfig | 1 | ||||
| -rw-r--r-- | mm/Kconfig | 2 |
3 files changed, 5 insertions, 1 deletions
diff --git a/arch/Kconfig b/arch/Kconfig index a62965d057f6..550cce4dd648 100644 --- a/arch/Kconfig +++ b/arch/Kconfig @@ -313,4 +313,7 @@ config HAVE_IRQ_TIME_ACCOUNTING Archs need to ensure they use a high enough resolution clock to support irq time accounting and then call enable_sched_clock_irqtime(). +config HAVE_ARCH_TRANSPARENT_HUGEPAGE + bool + source "kernel/gcov/Kconfig" diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 6119d6c7002e..1ae94bcae5d9 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -88,6 +88,7 @@ config X86 select IRQ_FORCED_THREADING select USE_GENERIC_SMP_HELPERS if SMP select HAVE_BPF_JIT if X86_64 + select HAVE_ARCH_TRANSPARENT_HUGEPAGE select CLKEVT_I8253 select ARCH_HAVE_NMI_SAFE_CMPXCHG select GENERIC_IOMAP diff --git a/mm/Kconfig b/mm/Kconfig index d5c8019c6627..3322342a1ffb 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS config TRANSPARENT_HUGEPAGE bool "Transparent Hugepage Support" - depends on X86 && MMU + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE select COMPACTION help Transparent Hugepages allows the kernel to use huge pages and |