Thread (56 messages) 56 messages, 4 authors, 2021-12-16
STALE1625d
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[PATCH 17/31] kasan, vmalloc: drop outdated VM_KASAN comment

From: <hidden>
Date: 2021-11-30 22:07:04
Also in: linux-mm, lkml
Subsystem: the rest, vmalloc · Maintainers: Linus Torvalds, Andrew Morton, Uladzislau Rezki

From: Andrey Konovalov <redacted>

The comment about VM_KASAN in include/linux/vmalloc.c is outdated.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 <redacted>
---
 include/linux/vmalloc.h | 11 -----------
 1 file changed, 11 deletions(-)
diff --git a/include/linux/vmalloc.h b/include/linux/vmalloc.h
index 6e022cc712e6..b22369f540eb 100644
--- a/include/linux/vmalloc.h
+++ b/include/linux/vmalloc.h
@@ -28,17 +28,6 @@ struct notifier_block;		/* in notifier.h */
 #define VM_MAP_PUT_PAGES	0x00000200	/* put pages and free array in vfree */
 #define VM_NO_HUGE_VMAP		0x00000400	/* force PAGE_SIZE pte mapping */
 
-/*
- * 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


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