[PATCH] arm64: ftrace: forbid CALL_OPS with CC_OPTIMIZE_FOR_SIZE

[Catalin Marinas]

On Mon, 27 Feb 2023 11:58:19 +0000, Mark Rutland wrote:
> Florian reports that when building with CONFIG_CC_OPTIMIZE_FOR_SIZE=y,
> he sees "Misaligned patch-site" warnings at boot, e.g.
> 
> | Misaligned patch-site bcm2836_arm_irqchip_handle_irq+0x0/0x88
> | WARNING: CPU: 0 PID: 0 at arch/arm64/kernel/ftrace.c:120 ftrace_call_adjust+0x4c/0x70
> 
> This is because GCC will silently ignore `-falign-functions=N` when
> passed `-Os`, resulting in functions not being aligned as we expect.
> This is a known issue, and to account for this we modified the kernel to
> avoid `-Os` generally. Unfortunately we forgot to account for
> CONFIG_CC_OPTIMIZE_FOR_SIZE.
> 
> [...]

Applied to arm64 (for-next/core), thanks!

[1/1] arm64: ftrace: forbid CALL_OPS with CC_OPTIMIZE_FOR_SIZE
      https://git.kernel.org/arm64/c/b3f11af9b2ce

-- 
Catalin