[PATCH v6 01/13] mm/hugepage pud: Allow arch-specific helper function to check huge page pud support
STALE1165d
REVIEWED: 1 (0M)
From: Aneesh Kumar K.V <hidden>
Date: 2023-07-24 19:09:53
Also in:
linux-mm
Subsystem:
libnvdimm: non-volatile memory device subsystem, memory management - core, the rest · Maintainers:
Dan Williams, Vishal Verma, Dave Jiang, Alison Schofield, Andrew Morton, David Hildenbrand, Linus Torvalds
Revision v6 of 6 in this series; 1 review trailer.
Revisions (6)
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. Reviewed-by: Christophe Leroy <redacted> 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 5f36c055794b..5eb6bdf30c62 100644
--- a/include/linux/pgtable.h
+++ b/include/linux/pgtable.h@@ -1505,6 +1505,9 @@ 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.
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2.41.0