[RFC PATCH v3 1/2] mm/hugetlb: Introduce ARCH_HAS_GIGANTIC_PAGE
From: Xie Yisheng <hidden>
Date: 2016-08-22 13:23:33
Also in:
linux-arm-kernel, lkml
Subsystem:
filesystems (vfs and infrastructure), hugetlb subsystem, memory management, s390 architecture, the rest, x86 architecture (32-bit and 64-bit) · Maintainers:
Alexander Viro, Christian Brauner, Muchun Song, Oscar Salvador, Andrew Morton, Heiko Carstens, Vasily Gorbik, Alexander Gordeev, Linus Torvalds, Thomas Gleixner, Ingo Molnar, Borislav Petkov, Dave Hansen
Avoid making ifdef get pretty unwieldy if many ARCHs support gigantic page. No functional change with this patch. Signed-off-by: Xie Yisheng <redacted> --- arch/s390/Kconfig | 1 + arch/x86/Kconfig | 1 + fs/Kconfig | 3 +++ mm/hugetlb.c | 2 +- 4 files changed, 6 insertions(+), 1 deletion(-)
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig
index e751fe2..a8c8fa3 100644
--- a/arch/s390/Kconfig
+++ b/arch/s390/Kconfig@@ -72,6 +72,7 @@ config S390 select ARCH_HAS_DEVMEM_IS_ALLOWED select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_GCOV_PROFILE_ALL + select ARCH_HAS_GIGANTIC_PAGE select ARCH_HAS_KCOV select ARCH_HAS_SG_CHAIN select ARCH_HAVE_NMI_SAFE_CMPXCHG
diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig
index c580d8c..2fdc300 100644
--- a/arch/x86/Kconfig
+++ b/arch/x86/Kconfig@@ -29,6 +29,7 @@ config X86 select ARCH_HAS_ELF_RANDOMIZE select ARCH_HAS_FAST_MULTIPLIER select ARCH_HAS_GCOV_PROFILE_ALL + select ARCH_HAS_GIGANTIC_PAGE if X86_64 select ARCH_HAS_KCOV if X86_64 select ARCH_HAS_PMEM_API if X86_64 select ARCH_HAS_MMIO_FLUSH
diff --git a/fs/Kconfig b/fs/Kconfig
index 2bc7ad7..b938205 100644
--- a/fs/Kconfig
+++ b/fs/Kconfig@@ -199,6 +199,9 @@ config HUGETLBFS config HUGETLB_PAGE def_bool HUGETLBFS +config ARCH_HAS_GIGANTIC_PAGE + bool + source "fs/configfs/Kconfig" source "fs/efivarfs/Kconfig"
diff --git a/mm/hugetlb.c b/mm/hugetlb.c
index 87e11d8..8488dcc 100644
--- a/mm/hugetlb.c
+++ b/mm/hugetlb.c@@ -1022,7 +1022,7 @@ static int hstate_next_node_to_free(struct hstate *h, nodemask_t *nodes_allowed) ((node = hstate_next_node_to_free(hs, mask)) || 1); \ nr_nodes--) -#if (defined(CONFIG_X86_64) || defined(CONFIG_S390)) && \ +#if defined(CONFIG_ARCH_HAS_GIGANTIC_PAGE) && \ ((defined(CONFIG_MEMORY_ISOLATION) && defined(CONFIG_COMPACTION)) || \ defined(CONFIG_CMA)) static void destroy_compound_gigantic_page(struct page *page,
--
1.7.12.4
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