]> git.baikalelectronics.ru Git - kernel.git/commit
x86/vdso: Use ->fault() instead of remap_pfn_range() for the vvar mapping
authorAndy Lutomirski <luto@kernel.org>
Wed, 30 Dec 2015 04:12:23 +0000 (20:12 -0800)
committerIngo Molnar <mingo@kernel.org>
Tue, 12 Jan 2016 10:59:35 +0000 (11:59 +0100)
commit92e9051c4cedbb972f66e0712bdf33e3a07ae794
tree3a4f15af8e038474301769349605c735ba757f90
parentb58884468a0190b5f9e2b84179b362d249bd1450
x86/vdso: Use ->fault() instead of remap_pfn_range() for the vvar mapping

This is IMO much less ugly, and it also opens the door to
disallowing unprivileged userspace HPET access on systems with
usable TSCs.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Reviewed-by: Kees Cook <keescook@chromium.org>
Cc: Andy Lutomirski <luto@amacapital.net>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Dave Hansen <dave.hansen@linux.intel.com>
Cc: Fenghua Yu <fenghua.yu@intel.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Oleg Nesterov <oleg@redhat.com>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Quentin Casasnovas <quentin.casasnovas@oracle.com>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/c19c2909e5ee3c3d8742f916586676bb7c40345f.1451446564.git.luto@kernel.org
Signed-off-by: Ingo Molnar <mingo@kernel.org>
arch/x86/entry/vdso/vma.c