From: Walter Wu <walter-zh.wu@xxxxxxxxxxxx> Subject: kasan: update documentation for generic kasan Generic KASAN will support to record the last two call_rcu() call stacks and print them in KASAN report. So that need to update documentation. Link: http://lkml.kernel.org/r/20200601051111.1359-1-walter-zh.wu@xxxxxxxxxxxx Signed-off-by: Walter Wu <walter-zh.wu@xxxxxxxxxxxx> Reviewed-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Tested-by: Dmitry Vyukov <dvyukov@xxxxxxxxxx> Reviewed-by: Andrey Konovalov <andreyknvl@xxxxxxxxxx> Cc: Andrey Ryabinin <aryabinin@xxxxxxxxxxxxx> Cc: Alexander Potapenko <glider@xxxxxxxxxx> Cc: Jonathan Corbet <corbet@xxxxxxx> Cc: Matthias Brugger <matthias.bgg@xxxxxxxxx> Cc: "Paul E . McKenney" <paulmck@xxxxxxxxxx> Cc: Josh Triplett <josh@xxxxxxxxxxxxxxxx> Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx> Cc: Lai Jiangshan <jiangshanlai@xxxxxxxxx> Cc: Joel Fernandes <joel@xxxxxxxxxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- Documentation/dev-tools/kasan.rst | 3 +++ 1 file changed, 3 insertions(+) --- a/Documentation/dev-tools/kasan.rst~kasan-update-documentation-for-generic-kasan +++ a/Documentation/dev-tools/kasan.rst @@ -190,6 +190,9 @@ function calls GCC directly inserts the This option significantly enlarges kernel but it gives x1.1-x2 performance boost over outline instrumented kernel. +Generic KASAN prints up to 2 call_rcu() call stacks in reports, the last one +and the second to last. + Software tag-based KASAN ~~~~~~~~~~~~~~~~~~~~~~~~ _
