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>

diff --git a/init/Kconfig b/init/Kconfig
index b170aa1..29d9e47 100644 (file)
--- 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)"