MAINTAINERS: Describe differences between F: and N: patterns

[Joe Perches <joe@perches.com>]

There is a difference in how scripts/get_maintainer.pl treats
F: and N: file pattern matches.

Describe those differences in the MAINTAINERS file.

Signed-off-by: Joe Perches <joe@perches.com>
---

On Fri, 2013-12-20 at 21:21 +0100, Uwe Kleine-König wrote:
> Acked-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
> Acked-by: Mark Brown <broonie@linaro.org>
> Signed-off-by: Uwe Kleine-König <u.kleine-koenig@pengutronix.de>
> On Fri, Dec 20, 2013 at 11:55:30PM +0400, Alexander Shiyan wrote:
> > [...]
> > > +F: arch/arm/boot/dts/efm32*
> > > +F: arch/arm/configs/efm32_defconfig
> > > +F: arch/arm/include/debug/efm32.S
> > > +F: arch/arm/mach-efm32/
> > > +F: drivers/clk/clk-efm32gg.c
> > > +F: drivers/clocksource/time-efm32.c
> > > +F: drivers/spi/spi-efm32.c
> > > +F: drivers/tty/serial/efm32-uart.c
> > > +F: include/dt-bindings/clock/efm32-cmu.h
> > > +F: include/linux/platform_data/efm32-*
> > 
> > Maybe "N" keyword with "efm32" is better here?
> ah, didn't know about that. Nice.
> 
> So the changes since v1 are:
>  - use N: efm32
>  - add acks from Greg and Mark
>    I assume it's ok to keep them for v2 assuming they mean them being OK with
>    me maintaining the efm32 stuff and not the way to express that in
>    MAINTAINERS.

 MAINTAINERS | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/MAINTAINERS b/MAINTAINERS
index 1344816..ebdb523 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -93,6 +93,11 @@ Descriptions of section entries:
 	N: Files and directories with regex patterns.
 	   N:	[^a-z]tegra	all files whose path contains the word tegra
 	   One pattern per line.  Multiple N: lines acceptable.
+	   scripts/get_maintainer.pl has different behavior for files that
+	   match F: pattern and matches of N: patterns.  By default,
+	   get_maintainer will not look at git log history when an F: pattern
+	   match occurs.  When an N: match occurs, git log history is used
+	   to also notify the people that have git commit signatures.
 	X: Files and directories that are NOT maintained, same rules as F:
 	   Files exclusions are tested before file matches.
 	   Can be useful for excluding a specific subdirectory, for instance: