* Thomas Garnier <thgarnie@xxxxxxxxxx> wrote: > This patch aligns MODULES_END to the beginning of the Fixmap section. > It optimizes the space available for both sections. The address is > pre-computed based on the number of pages required by the Fixmap > section. > > It will allow GDT remapping in the Fixmap section. The current > MODULES_END static address does not provide enough space for the kernel > to support a large number of processors. > > Signed-off-by: Thomas Garnier <thgarnie@xxxxxxxxxx> > --- > Based on next-20170308 > --- > Documentation/x86/x86_64/mm.txt | 5 ++++- > arch/x86/include/asm/pgtable_64_types.h | 3 ++- > arch/x86/kernel/module.c | 1 + > arch/x86/mm/dump_pagetables.c | 1 + > arch/x86/mm/kasan_init_64.c | 1 + > mm/vmalloc.c | 1 + > --- a/mm/vmalloc.c > +++ b/mm/vmalloc.c > @@ -35,6 +35,7 @@ > #include <linux/uaccess.h> > #include <asm/tlbflush.h> > #include <asm/shmparam.h> > +#include <asm/fixmap.h> > > #include "internal.h" Note that asm/fixmap.h is an x86-ism that isn't present in many other architectures, so this hunk will break the build. To make progress with these patches I've fixed it up with an ugly #ifdef CONFIG_X86, but it needs a real solution instead before this can be pushed upstream. Thanks, Ingo =====================> mm/vmalloc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) diff --git a/mm/vmalloc.c b/mm/vmalloc.c index dabea6a29fad..b7d2a23349f4 100644 --- a/mm/vmalloc.c +++ b/mm/vmalloc.c @@ -35,7 +35,10 @@ #include <linux/uaccess.h> #include <asm/tlbflush.h> #include <asm/shmparam.h> -#include <asm/fixmap.h> + +#ifdef CONFIG_X86 +# include <asm/fixmap.h> +#endif #include "internal.h"
