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

From: Andreas Ziegler
Date: Thu Sep 03 2015 - 05:33:45 EST

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)

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,


To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at
Please read the FAQ at