On Thu, May 04, 2017 at 10:51:57PM +0200, Arnd Bergmann wrote:
> This shuts up a warning in the 3.18-stable series that has been fixed
> in newer kernels with commit 498a92d42596 ("ARM: cns3xxx: pci: avoid
> potential stack overflow"):
>
> arch/arm/mach-cns3xxx/pcie.c: In function 'cns3xxx_pcie_hw_init':
> arch/arm/mach-cns3xxx/pcie.c:313:1: error: the frame size of 1080 bytes is larger than 1024 bytes [-Werror=frame-larger-than=]
>
> The fix that went into v4.4 is known to be buggy and was later
> fixed again with commit 88e9da9a2a70 ("CNS3xxx: Fix PCI
> cns3xxx_write_config()"). While we could backport both to 3.18,
> they are fairly invasive and the warning is definitely harmless
> here as the call chain is known to not overflow the stack of the
> init task.
>
> This simply adds a Makefile flag to extend the limit for this one
> file.
>
> Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
> ---
> We do want 88e9da9a2a70 ("CNS3xxx: Fix PCI cns3xxx_write_config()")
> backported into v4.4 though.
That's already there, thanks.
greg k-h