+ kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch added to -mm tree

+ kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch added to -mm tree

[akpm]

The patch titled
     Subject: kcov: add __no_sanitize_coverage to fix noinstr for all architectures
has been added to the -mm tree.  Its filename is
     kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch

This patch should soon appear at
    https://ozlabs.org/~akpm/mmots/broken-out/kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch
and later at
    https://ozlabs.org/~akpm/mmotm/broken-out/kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch

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------------------------------------------------------
From: Marco Elver <elver@google.com>
Subject: kcov: add __no_sanitize_coverage to fix noinstr for all architectures

add comment explaining __has_feature() in Clang

Link: https://lkml.kernel.org/r/20210527194448.3470080-1-elver@google.com
Signed-off-by: Marco Elver <elver@google.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Miguel Ojeda <ojeda@kernel.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
---

 include/linux/compiler-clang.h |    6 ++++++
 1 file changed, 6 insertions(+)

--- a/include/linux/compiler-clang.h~kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3
+++ a/include/linux/compiler-clang.h
@@ -13,6 +13,12 @@
 /* all clang versions usable with the kernel support KASAN ABI version 5 */
 #define KASAN_ABI_VERSION 5
 
+/*
+ * Note: Checking __has_feature(*_sanitizer) is only true if the feature is
+ * enabled. Therefore it is not required to additionally check defined(CONFIG_*)
+ * to avoid adding redundant attributes in other configurations.
+ */
+
 #if __has_feature(address_sanitizer) || __has_feature(hwaddress_sanitizer)
 /* Emulate GCC's __SANITIZE_ADDRESS__ flag */
 #define __SANITIZE_ADDRESS__
_

Patches currently in -mm which might be from elver@google.com are

kfence-use-task_idle-when-awaiting-allocation.patch
mm-slub-change-run-time-assertion-in-kmalloc_index-to-compile-time-fix.patch
printk-introduce-dump_stack_lvl-fix.patch
kfence-unconditionally-use-unbound-work-queue.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v2.patch
kcov-add-__no_sanitize_coverage-to-fix-noinstr-for-all-architectures-v3.patch