x86/mm: Add kerneldoc comments for pcommit_sfence()
x86/mm: Add kerneldoc comments for pcommit_sfence()

Add kerneldoc comments for pcommit_sfence() describing the
purpose of the PCOMMIT instruction and demonstrating its usage
with an example.

Signed-off-by: Ross Zwisler <19f56ffe3ac18f81d12a74c011e044bc6df12299@linux.intel.com>
Signed-off-by: Borislav Petkov <0691a664b24b6f15b20cd5aee64b72271db08be1@suse.de>
Cc: Andrew Morton <5c1e68b099950c134891f0b6e179498a8ebe9cf9@linux-foundation.org>
Cc: Andy Lutomirski <2cc0d0d76de2e6f37b92deeb83c85cb306fc5dc1@amacapital.net>
Cc: Borislav Petkov <0691a664b24b6f15b20cd5aee64b72271db08be1@alien8.de>
Cc: Brian Gerst <e60badcb99f652a0bcc15460d39f7ea12d6655ee@gmail.com>
Cc: Denys Vlasenko <50fbbd36fe0f9c8261d4a3c762c8c29ffb35e48f@redhat.com>
Cc: H Peter Anvin <6d5297bd64b7ed8c3a61db3493cd21116f767e52@intel.com>
Cc: H. Peter Anvin <8a453bad9912ffe59bc0f0b8abe03df9be19379e@zytor.com>
Cc: Linus Torvalds <69652caca27c8b940640ad396ab71f93cacec34f@linux-foundation.org>
Cc: Luis R. Rodriguez <d4fa18192c5a479e564d29c2300c2e15afd1d8d7@suse.com>
Cc: Peter Zijlstra <3fddac958924aef220f202ca567388ddab3f14a8@infradead.org>
Cc: Thomas Gleixner <00e4cf8f46a57000a44449bf9dd8cbbcc209fd2a@linutronix.de>
Cc: Toshi Kani <322b9f75d3806917607539efc168804d71b9503d@hp.com>
Link: http://lkml.kernel.org/r/1430261196-2401-1-git-send-email-19f56ffe3ac18f81d12a74c011e044bc6df12299@linux.intel.com
Link: http://lkml.kernel.org/r/1431332153-18566-7-git-send-email-0691a664b24b6f15b20cd5aee64b72271db08be1@alien8.de
Signed-off-by: Ingo Molnar <9dbbbf0688fedc85ad4da37637f1a64b8c718ee2@kernel.org>

KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs,KristFoundation/Programs