| From: Andrey Konovalov <andreyknvl@google.com> |
| Subject: kasan, vmalloc: drop outdated VM_KASAN comment |
| |
| The comment about VM_KASAN in include/linux/vmalloc.c is outdated. |
| VM_KASAN is currently only used to mark vm_areas allocated for kernel |
| modules when CONFIG_KASAN_VMALLOC is disabled. |
| |
| Drop the comment. |
| |
| Link: https://lkml.kernel.org/r/780395afea83a147b3b5acc36cf2e38f7f8479f9.1643047180.git.andreyknvl@google.com |
| Signed-off-by: Andrey Konovalov <andreyknvl@google.com> |
| Reviewed-by: Alexander Potapenko <glider@google.com> |
| Acked-by: Marco Elver <elver@google.com> |
| Cc: Andrey Ryabinin <ryabinin.a.a@gmail.com> |
| Cc: Catalin Marinas <catalin.marinas@arm.com> |
| Cc: Dmitry Vyukov <dvyukov@google.com> |
| Cc: Evgenii Stepanov <eugenis@google.com> |
| Cc: Mark Rutland <mark.rutland@arm.com> |
| Cc: Peter Collingbourne <pcc@google.com> |
| Cc: Vincenzo Frascino <vincenzo.frascino@arm.com> |
| Cc: Will Deacon <will@kernel.org> |
| Signed-off-by: Andrew Morton <akpm@linux-foundation.org> |
| --- |
| |
| include/linux/vmalloc.h | 11 ----------- |
| 1 file changed, 11 deletions(-) |
| |
| --- a/include/linux/vmalloc.h~kasan-vmalloc-drop-outdated-vm_kasan-comment |
| +++ a/include/linux/vmalloc.h |
| @@ -35,17 +35,6 @@ struct notifier_block; /* in notifier.h |
| #define VM_DEFER_KMEMLEAK 0 |
| #endif |
| |
| -/* |
| - * VM_KASAN is used slightly differently depending on CONFIG_KASAN_VMALLOC. |
| - * |
| - * If IS_ENABLED(CONFIG_KASAN_VMALLOC), VM_KASAN is set on a vm_struct after |
| - * shadow memory has been mapped. It's used to handle allocation errors so that |
| - * we don't try to poison shadow on free if it was never allocated. |
| - * |
| - * Otherwise, VM_KASAN is set for kasan_module_alloc() allocations and used to |
| - * determine which allocations need the module shadow freed. |
| - */ |
| - |
| /* bits [20..32] reserved for arch specific ioremap internals */ |
| |
| /* |
| _ |
