Messages in this thread Patch in this message | | | From | Song Liu <> | Subject | [PATCH v5 bpf-next 3/5] vmalloc: WARN for set_vm_flush_reset_perms() on huge pages | Date | Fri, 24 Jun 2022 14:57:10 -0700 |
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VM_FLUSH_RESET_PERMS is not yet ready for huge pages, add a WARN to catch misuse soon.
Suggested-by: Rick Edgecombe <rick.p.edgecombe@intel.com> Signed-off-by: Song Liu <song@kernel.org> --- include/linux/vmalloc.h | 1 + 1 file changed, 1 insertion(+)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h index 096d48aa3437..59d3e1f3e108 100644 --- a/include/linux/vmalloc.h +++ b/include/linux/vmalloc.h @@ -239,6 +239,7 @@ static inline void set_vm_flush_reset_perms(void *addr) { struct vm_struct *vm = find_vm_area(addr); + WARN_ON_ONCE(is_vm_area_hugepages(addr)); if (vm) vm->flags |= VM_FLUSH_RESET_PERMS; } -- 2.30.2
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