Commit-ID: 36a39ac967a548154a0fe44d71cb0063fa05010f Gitweb: http://git.kernel.org/tip/36a39ac967a548154a0fe44d71cb0063fa05010f Author: Borislav Petkov <b...@suse.de> AuthorDate: Sat, 7 May 2016 11:59:40 +0200 Committer: Ingo Molnar <mi...@kernel.org> CommitDate: Tue, 10 May 2016 10:12:02 +0200
x86/boot: Comment what finalize_identity_maps() does So it is not really obvious that finalize_identity_maps() doesn't do any finalization but it *actually* writes CR3 with the ident PGD. Comment that at the call site. Signed-off-by: Borislav Petkov <b...@suse.de> Cc: Andy Lutomirski <l...@amacapital.net> Cc: Borislav Petkov <b...@alien8.de> Cc: Brian Gerst <brge...@gmail.com> Cc: Denys Vlasenko <dvlas...@redhat.com> Cc: H. Peter Anvin <h...@zytor.com> Cc: Kees Cook <keesc...@chromium.org> Cc: Linus Torvalds <torva...@linux-foundation.org> Cc: Peter Zijlstra <pet...@infradead.org> Cc: Thomas Gleixner <t...@linutronix.de> Cc: a...@linux-foundation.org Cc: b...@redhat.com Cc: dyo...@redhat.com Cc: jkos...@suse.cz Cc: linux-tip-comm...@vger.kernel.org Cc: l...@kernel.org Cc: vgo...@redhat.com Cc: ying...@kernel.org Link: http://lkml.kernel.org/r/20160507100541.ga24...@pd.tnic Signed-off-by: Ingo Molnar <mi...@kernel.org> --- arch/x86/boot/compressed/kaslr.c | 2 ++ 1 file changed, 2 insertions(+) diff --git a/arch/x86/boot/compressed/kaslr.c b/arch/x86/boot/compressed/kaslr.c index f82975b..f5a138c 100644 --- a/arch/x86/boot/compressed/kaslr.c +++ b/arch/x86/boot/compressed/kaslr.c @@ -437,6 +437,8 @@ unsigned char *choose_random_location(unsigned long input, choice = random_addr; add_identity_map(choice, output_size); + + /* This actually loads the identity pagetable on x86_64. */ finalize_identity_maps(); out: return (unsigned char *)choice;
