parisc: adjust L1_CACHE_BYTES to 128 bytes on PA8800 and PA8900 CPUs

Hi Helge,

today's linux-next tree (next-20150903) contains commit 20f924902ff6 ("parisc: adjust L1_CACHE_BYTES to 128 bytes on PA8800 and PA8900 CPUs") which you authored.

I noticed it because we[0] are running a daily analysis on all commits in linux-next as part of our research and our tools reported it.

In the patch, you create the following #if defined() structure in arch/parisc/include/asm/cache.h (lines 16 and following):

#if defined(CONFIG_PA8X00)
...
#elif defined(CONFIG_PA20)
...
#else
...
#endif

In Kconfig, CONFIG_PA20 is defined as the following (arch/parisc/Kconfig, line 163):

config PA20
def_bool y
depends on PA8X00

This means that CONFIG_PA20 can and will only be enabled if CONFIG_PA8X00 has already been enabled, which means that the contents of the "#elif defined(CONFIG_PA20)" block can never be reached: its condition is only evaluated if CONFIG_PA8X00 is disabled, but then CONFIG_PA20 can never be enabled either.

Best regards,

Andreas

[0] https://cados.cs.fau.de

Hi Andreas,

That's absolutely true.
I'll fix it with the next iteration of this patch.

Thanks,
Helge