Messages in this thread Patch in this message | | | From | Song Liu <> | Subject | [PATCH v5 bpf-next 4/5] vmalloc: introduce huge_vmalloc_supported | Date | Fri, 24 Jun 2022 14:57:11 -0700 |
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huge_vmalloc_supported() exposes vmap_allow_huge so that users of vmalloc APIs could know whether vmalloc will return huge pages.
Suggested-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Signed-off-by: Song Liu <song@kernel.org> --- include/linux/vmalloc.h | 6 ++++++ mm/vmalloc.c | 5 +++++ 2 files changed, 11 insertions(+)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 59d3e1f3e108..aa2182959fc5 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -243,11 +243,17 @@ static inline void set_vm_flush_reset_perms(void *addr) if (vm) vm->flags |= VM_FLUSH_RESET_PERMS; } +bool huge_vmalloc_supported(void); #else static inline void set_vm_flush_reset_perms(void *addr) { } + +static inline bool huge_vmalloc_supported(void) +{ + return false; +} #endif /* for /proc/kcore */ diff --git a/mm/vmalloc.c b/mm/vmalloc.c index effd1ff6a4b4..0a5add4b5b2d 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -72,6 +72,11 @@ early_param("nohugevmalloc", set_nohugevmalloc); static const bool vmap_allow_huge = false; #endif /* CONFIG_HAVE_ARCH_HUGE_VMALLOC */ +bool huge_vmalloc_supported(void) +{ + return vmap_allow_huge; +} + bool is_vmalloc_addr(const void *x) { unsigned long addr = (unsigned long)kasan_reset_tag(x); -- 2.30.2
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