| Date | Thu, 28 Sep 2017 10:35:24 +0200 | From | Ingo Molnar <> | Subject | Re: [PATCHv7 15/19] x86/mm: Replace compile-time checks for 5-level with runtime-time |
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* Kirill A. Shutemov <kirill.shutemov@linux.intel.com> wrote:
> This patch converts the of CONFIG_X86_5LEVEL check to runtime checks for > p4d folding. > > Signed-off-by: Kirill A. Shutemov <kirill.shutemov@linux.intel.com> > --- > arch/x86/mm/fault.c | 2 +- > arch/x86/mm/ident_map.c | 2 +- > arch/x86/mm/init_64.c | 30 ++++++++++++++++++------------ > arch/x86/mm/kasan_init_64.c | 12 ++++++------ > arch/x86/mm/kaslr.c | 6 +++--- > arch/x86/platform/efi/efi_64.c | 2 +- > arch/x86/power/hibernate_64.c | 6 +++--- > 7 files changed, 33 insertions(+), 27 deletions(-)
> +/* > + * When memory was added make sure all the processes MM have > + * suitable PGD entries in the local PGD level page. > + */ > +void sync_global_pgds(unsigned long start, unsigned long end) > +{ > + if (pgtable_l5_enabled) > + sync_global_pgds_57(start, end); > + else > + sync_global_pgds_48(start, end); > +}
We should use the _l4 and _l5 postfixes instead of random _57 and _48 that is pretty cryptic to most readers of the code.
Thanks,
Ingo
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