Hi Chen, On 07/25/2013 02:37 AM, Chen Gang F T wrote: > On 07/24/2013 10:00 PM, James Bottomley wrote: >> >> On Wed, 2013-07-24 at 16:12 +0800, Chen Gang wrote: >>> For server, 64-bit kernel is widely used and '64BIT' have been already >>> as the default option of a server. >>> >>> So better to use 64-bit kernel as default choise instead of 32-bit >>> kernel. >> >> I think this is irrelevant since we have defconfig for this. I do have the same opinion. It's not necessary. Furthermore, for a real 64 bit kernel you need to enable CONFIG_64BIT not CONFIG_PA8X00. > Hmm... but I still suggest when use 'allmodconfig' let 64-bit as the > default choice (normally 64-bit is the default choice for servers). Yeah, but we do support workstations as well. >>> Or when use cross-compiler 'hppa64-linux-gnu-gcc' with allmodconfig, it >>> will report BUILD_BUG_ON: >>> >>> arch/parisc/mm/init.c: In function ‘mem_init’: >>> arch/parisc/mm/init.c:581:2: error: call to ‘__compiletime_assert_581’ declared with attribute error: BUILD_BUG_ON failed: PTE_ENTRY_SIZE != sizeof(pte_t) >> >> This shows you're using a buggy compiler. PTE_OFFSET_SIZE is generated >> as part of the build process, so you need a correct compiler. >> > > Hmm... It means the compiler assumes to build 64-bit code (hppa64), but > our configuration is for 32-bit, they are mismatch. > > Maybe we can say hppa64-linux-gnu-gcc can not build the 32-bit parisc > code (although it is not precise), but at least, it is not a real bug. It's a fact: hppa64-linux-gnu-gcc can *not* build the 32-bit parisc. Only hppa-linux-gnu-gcc can build 32bit code. > This contents wants to say: when use 'allmodconfig' for a server, we do > not build a 64-bit server. > > >>> Signed-off-by: Chen Gang <gang.chen@xxxxxxxxxxx> Thanks for your patch, but: NAK. Helge >>> --- >>> arch/parisc/Kconfig | 2 +- >>> 1 files changed, 1 insertions(+), 1 deletions(-) >>> >>> diff --git a/arch/parisc/Kconfig b/arch/parisc/Kconfig >>> index aa399a5..37bdecf 100644 >>> --- a/arch/parisc/Kconfig >>> +++ b/arch/parisc/Kconfig >>> @@ -111,7 +111,7 @@ menu "Processor type and features" >>> >>> choice >>> prompt "Processor type" >>> - default PA7000 >>> + default PA8X00 >> >> This doesn't require 64 bit: PA8xxx processors can operate happily in 32 >> bit mode it does make the question appear, since PA7xxx are 32 bit only. >> > > Yeah, 'PA8X00' can compitable with 32-bit, but it likes 64-bit, the > following config files are for 'PA8X00': > > a500_defconfig: for 64-bit > c3000_defconfig: for 32-bit > c8000_defconfig: for 64-bit > generic-64bit_defconfig: for 64-bit > > At least, we can say PA8xxx is a 64-bit processor for parisc, is it > correct ? > > And for 'allmodconfig', if let 'PA8X00' as default choice, it will build > 64-bit kernel. > > > Thanks. > -- To unsubscribe from this list: send the line "unsubscribe linux-parisc" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
