lib: add lib/glob.c

This is a helper function from drivers/ata/libata_core.c, where it is
used to blacklist particular device models.  It's being moved to lib/ so
other drivers may use it for the same purpose.

This implementation in non-recursive, so is safe for the kernel stack.

[akpm@linux-foundation.org: fix sparse warning]
Signed-off-by: George Spelvin <linux@horizon.com>
Cc: Randy Dunlap <rdunlap@infradead.org>
Cc: Tejun Heo <tj@kernel.org>
Cc: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

1 files changed, 19 insertions, 0 deletions

diff --git a/lib/Kconfig b/lib/Kconfig
index a8a775730c0..41bfeec72e4 100644
--- a/lib/Kconfig
+++ b/lib/Kconfig
@@ -396,6 +396,25 @@ config CPU_RMAP
 config DQL
 	bool
 
+config GLOB
+	bool
+#	This actually supports modular compilation, but the module overhead
+#	is ridiculous for the amount of code involved.	Until an out-of-tree
+#	driver asks for it, we'll just link it directly it into the kernel
+#	when required.  Since we're ignoring out-of-tree users,	there's also
+#	no need bother prompting for a manual decision:
+#	prompt "glob_match() function"
+	help
+	  This option provides a glob_match function for performing
+	  simple text pattern matching.  It originated in the ATA code
+	  to blacklist particular drive models, but other device drivers
+	  may need similar functionality.
+
+	  All drivers in the Linux kernel tree that require this function
+	  should automatically select this option.  Say N unless you
+	  are compiling an out-of tree driver which tells you that it
+	  depends on this.
+
 #
 # Netlink attribute parsing support is select'ed if needed
 #