kbuild: clarify the creation of the LOCALVERSION_AUTO string.

Clarify the creation of the LOCALVERSION_AUTO string during kernel
configuration, and fix a couple typoes while we're there.

Signed-off-by: Robert P. J. Day <rpjday@mindspring.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

1 files changed, 10 insertions, 6 deletions

diff --git a/init/Kconfig b/init/Kconfig
index b170aa1d43bd..29d9e47ee0da 100644
--- a/init/Kconfig
+++ b/init/Kconfig
@@ -80,16 +80,20 @@ config LOCALVERSION_AUTO
         default y
         help
           This will try to automatically determine if the current tree is a
-          release tree by looking for git tags that
-          belong to the current top of tree revision.
+          release tree by looking for git tags that belong to the current
+          top of tree revision.
 
           A string of the format -gxxxxxxxx will be added to the localversion
-          if a git based tree is found.  The string generated by this will be
+          if a git-based tree is found.  The string generated by this will be
           appended after any matching localversion* files, and after the value
-          set in CONFIG_LOCALVERSION
+          set in CONFIG_LOCALVERSION.
 
-          Note: This requires Perl, and a git repository, but not necessarily
-          the git or cogito tools to be installed.
+          (The actual string used here is the first eight characters produced
+          by running the command:
+
+            $ git rev-parse --verify HEAD
+
+          which is done within the script "scripts/setlocalversion".)
 
 config SWAP
         bool "Support for paging of anonymous memory (swap)"