[PATCH] powerpc/ftrace: Fix ftrace bug with KASAN=y

[Michael Ellerman]

On Thu, 07 Nov 2024 22:16:30 +1100, Michael Ellerman wrote:
> Booting a KASAN=y kernel with the recently added ftrace out-of-line
> support causes a warning at boot:
> 
>   ------------[ cut here ]------------
>   Stub index overflow (1729 > 1728)
>   WARNING: CPU: 0 PID: 0 at arch/powerpc/kernel/trace/ftrace.c:209 ftrace_init_nop+0x408/0x444
>   ...
>   NIP ftrace_init_nop+0x408/0x444
>   LR  ftrace_init_nop+0x404/0x444
>   Call Trace:
>     ftrace_init_nop+0x404/0x444 (unreliable)
>     ftrace_process_locs+0x544/0x8a0
>     ftrace_init+0xb4/0x22c
>     start_kernel+0x1dc/0x4d4
>     start_here_common+0x1c/0x20
>   ...
>   ftrace failed to modify
>   [<c0000000030beddc>] _sub_I_65535_1+0x8/0x3c
>    actual:   00:00:00:60
>   Initializing ftrace call sites
>   ftrace record flags: 0
>    (0)
>    expected tramp: c00000000008b418
>   ------------[ cut here ]------------
> 
> [...]

Applied to powerpc/next.

[1/1] powerpc/ftrace: Fix ftrace bug with KASAN=y
      https://git.kernel.org/powerpc/c/cfec8463d9a19ec043845525fe5fd675e59a8aab

cheers