[PATCH v2] maintainers: add regex matching for xsm

["Daniel P. Smith" <dpsmith@apertussolutions.com>]

XSM is a subsystem where it is equally important of how and where its hooks are
called as is the implementation of the hooks. The people best suited for
evaluating the how and where are the XSM maintainers and reviewers. This
creates a challenge as the hooks are used throughout the hypervisor for which
the XSM maintainers and reviewers are not, and should not be, a reviewer for
each of these subsystems in the MAINTAINERS file. Though the MAINTAINERS file
does support the use of regex matches, 'K' identifier, that are applied to both
the commit message and the commit delta. Adding the 'K' identifier will declare
that any patch relating to XSM require the input from the XSM maintainers and
reviewers. For those that use the get_maintianers script, the 'K' identifier
will automatically add the XSM maintainers and reviewers. Any one not using
get_maintainers, it will be their responsibility to ensure that if their work
touches and XSM hook, to ensure the XSM maintainers and reviewers are copied.

This patch adds a pair of regex expressions to the XSM section. The first is
`xsm_.*` which seeks to match XSM hooks in the commit's delta. The second is
`\b(xsm|XSM)\b` which seeks to match strictly the words xsm or XSM and should
not capture words with a substring of "xsm".

Signed-off-by: Daniel P. Smith <dpsmith@apertussolutions.com>
---
 MAINTAINERS | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index f2f1881b32..b0f0823d21 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -674,6 +674,8 @@ F:	tools/flask/
 F:	xen/include/xsm/
 F:	xen/xsm/
 F:	docs/misc/xsm-flask.txt
+K:	xsm_.*
+K:	\b(xsm|XSM)\b
 
 THE REST
 M:	Andrew Cooper <andrew.cooper3@citrix.com>
-- 
2.20.1