mm/util: deduplicate code in {kstrdup,kstrndup,kmemdup_nul}

These three functions follow the same pattern.  To deduplicate the code,
let's introduce a common helper __kmemdup_nul().

Link: https://lkml.kernel.org/r/[email protected]
Suggested-by: Andrew Morton <[email protected]>
Signed-off-by: Yafang Shao <[email protected]>
Cc: Simon Horman <[email protected]>
Cc: Matthew Wilcox <[email protected]>
Cc: Alejandro Colomar <[email protected]>
Cc: Alexander Viro <[email protected]>
Cc: Alexei Starovoitov <[email protected]>
Cc: Andy Shevchenko <[email protected]>
Cc: Catalin Marinas <[email protected]>
Cc: Christian Brauner <[email protected]>
Cc: Daniel Vetter <[email protected]>
Cc: David Airlie <[email protected]>
Cc: Eric Biederman <[email protected]>
Cc: Eric Paris <[email protected]>
Cc: James Morris <[email protected]>
Cc: Jan Kara <[email protected]>
Cc: Justin Stitt <[email protected]>
Cc: Kees Cook <[email protected]>
Cc: Linus Torvalds <[email protected]>
Cc: Maarten Lankhorst <[email protected]>
Cc: Matus Jokay <[email protected]>
Cc: Maxime Ripard <[email protected]>
Cc: Ondrej Mosnacek <[email protected]>
Cc: Paul Moore <[email protected]>
Cc: Quentin Monnet <[email protected]>
Cc: "Serge E. Hallyn" <[email protected]>
Cc: Stephen Smalley <[email protected]>
Cc: Steven Rostedt (Google) <[email protected]>
Cc: Tetsuo Handa <[email protected]>
Cc: Thomas Zimmermann <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions