[PATCH v2 06/16] mm/hugepage pud: Allow arch-specific helper function to check huge page pud support
From: Aneesh Kumar K.V <hidden>
Date: 2023-06-16 11:09:39
Also in:
linux-mm
Subsystem:
libnvdimm: non-volatile memory device subsystem, memory management - core, the rest · Maintainers:
Dan Williams, Vishal Verma, Dave Jiang, Ira Weiny, Andrew Morton, David Hildenbrand, Linus Torvalds
Architectures like powerpc would like to enable transparent huge page pud support only with radix translation. To support that add has_transparent_pud_hugepage() helper that architectures can override. Signed-off-by: Aneesh Kumar K.V <redacted> --- drivers/nvdimm/pfn_devs.c | 2 +- include/linux/pgtable.h | 3 +++ 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/nvdimm/pfn_devs.c b/drivers/nvdimm/pfn_devs.c
index af7d9301520c..18ad315581ca 100644
--- a/drivers/nvdimm/pfn_devs.c
+++ b/drivers/nvdimm/pfn_devs.c@@ -100,7 +100,7 @@ static unsigned long *nd_pfn_supported_alignments(unsigned long *alignments) if (has_transparent_hugepage()) { alignments[1] = HPAGE_PMD_SIZE; - if (IS_ENABLED(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD)) + if (has_transparent_pud_hugepage()) alignments[2] = HPAGE_PUD_SIZE; }
diff --git a/include/linux/pgtable.h b/include/linux/pgtable.h
index c5a51481bbb9..b3f4dd0240f5 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h@@ -1597,6 +1597,9 @@ typedef unsigned int pgtbl_mod_mask; #define has_transparent_hugepage() IS_BUILTIN(CONFIG_TRANSPARENT_HUGEPAGE) #endif +#ifndef has_transparent_pud_hugepage +#define has_transparent_pud_hugepage() IS_BUILTIN(CONFIG_HAVE_ARCH_TRANSPARENT_HUGEPAGE_PUD) +#endif /* * On some architectures it depends on the mm if the p4d/pud or pmd * layer of the page table hierarchy is folded or not.
--
2.40.1