On Fri, Jul 27, 2018 at 07:08:40PM +0000, Luck, Tony wrote: > >> mm/page_alloc.c:321:14: error: 'PAGES_PER_SECTION' undeclared (first use in this function); did you mean 'USEC_PER_SEC'? > > Weird. I unpacked that config file and tried to reproduce ... but got a clean build. > > Maybe my build flipped some other options because I'm using an ancient compiler? > I noticed this difference at the top of the output when I diffed my .config with the > supplied one: > > < CONFIG_GCC_VERSION=80100 > --- > > CONFIG_GCC_VERSION=40304 > > Mike: Did you see anything like this when you did cross builds? Yep, and I think it's not related to the compiler version. Selecting NO_BOOTMEM allows enabling the DEFERRED_STRUCT_PAGE_INIT option that in turn causes compilation of the code that uses PAGES_PER_SECTION. The definition of PAGES_PER_SECTION, though, depends on SPARSEMEM which is not enabled in allmconfig for ia64. I've sent a patch [1] to make DEFERRED_STRUCT_PAGE_INIT depend on SPARSEMEM, it's landed in the akmp tree. [1] https://lore.kernel.org/lkml/1530279308-24988-1-git-send-email-rppt@xxxxxxxxxxxxxxxxxx/#t > -Tony > > -- Sincerely yours, Mike. -- To unsubscribe from this list: send the line "unsubscribe linux-ia64" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
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