On Wed, Mar 10, 2021 at 05:09:30PM -0800, Manoj Gupta wrote:
> Dear stable kernel maintainers,
>
> Please consider applying the following patch for 4.{4,9,14,19}-y
> kernel branches.
> 9c8e2f6d3d36 scripts/recordmcount.{c,pl}: support -ffunction-sections
> .text.* section names
>
> It is needed to fix a kernel boot issue with trunk clang compiler
> which now puts functions with __cold attribute to .text.unlikely
> section. Please feel free to check
> https://bugs.chromium.org/p/chromium/issues/detail?id=1184483 for
> details.
>
> 9c8e2f6d3d36 applies cleanly for 4.14 and 4.19.
> For 4.4 and 4.9, a slight changed diff for scripts/recordmcount.c is
> needed to apply the patch cleanly. The final changed lines are still
> the same.
>
> scripts/recordmcount.c diff for 4.4 and 4.9 kernel.
>
> --- a/scripts/recordmcount.c
> +++ b/scripts/recordmcount.c
> @@ -362,7 +362,7 @@ static uint32_t (*w2)(uint16_t);
> static int
> is_mcounted_section_name(char const *const txtname)
> {
> - return strcmp(".text", txtname) == 0 ||
> + return strncmp(".text", txtname, 5) == 0 ||
> strcmp(".ref.text", txtname) == 0 ||
> strcmp(".sched.text", txtname) == 0 ||
> strcmp(".spinlock.text", txtname) == 0 ||
>
Can you provide properly backported versions for 4.4 and 4.9 so I can
apply them? Hand-editing them doesn't really work well...
thanks,
greg k-h
