Re: [PATCH 28/31] kasan: add kasan.vmalloc command line flag
From: Marco Elver <elver@google.com>
Date: 2021-12-03 12:09:26
Also in:
linux-mm, lkml
On Tue, Nov 30, 2021 at 11:08PM +0100, andrey.konovalov@linux.dev wrote: [...]
quoted hunk ↗ jump to hunk
enum kasan_arg_stacktrace { KASAN_ARG_STACKTRACE_DEFAULT, KASAN_ARG_STACKTRACE_OFF,@@ -40,6 +46,7 @@ enum kasan_arg_stacktrace { static enum kasan_arg kasan_arg __ro_after_init; static enum kasan_arg_mode kasan_arg_mode __ro_after_init; +static enum kasan_arg_vmalloc kasan_arg_vmalloc __ro_after_init; static enum kasan_arg_stacktrace kasan_arg_stacktrace __ro_after_init;
It just occurred to me that all of these (except kasan_arg_mode) are only used by __init functions, so they could actually be marked __initdata instead of __ro_after_init to free up some bytes after init. Not sure if you think it's worth it, I leave it to you. [...]
+ switch (kasan_arg_vmalloc) {
+ case KASAN_ARG_VMALLOC_DEFAULT:
+ /* Default to enabling vmalloc tagging. */
+ static_branch_enable(&kasan_flag_vmalloc);
+ break;
+ case KASAN_ARG_VMALLOC_OFF:
+ /* Do nothing, kasan_flag_vmalloc keeps its default value. */
+ break;
+ case KASAN_ARG_VMALLOC_ON:
+ static_branch_enable(&kasan_flag_vmalloc);
+ break;
+ }The KASAN_ARG_STACKTRACE_DEFAULT and KASAN_ARG_VMALLOC_ON cases can be combined. _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel