[PATCH mm v4 18/39] kasan, vmalloc: drop outdated VM_KASAN comment

andrey.konovalov
2021-12-20T22:00:23Z

The comment about VM_KASAN in include/linux/vmalloc.c is outdated.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.

Signed-off-by: Andrey Konovalov <andreyknvl@google.com>
Reviewed-by: Alexander Potapenko <glider@google.com>
---
include/linux/vmalloc.h | 11 -----------
1 file changed, 11 deletions(-)

diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index cde400a9fd87..34ac66a656d4 100644
--- a/include/linux/vmalloc.h
+++ b/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 */

/*
--
2.25.1