From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from mail-qc0-f171.google.com (mail-qc0-f171.google.com [209.85.216.171]) by kanga.kvack.org (Postfix) with ESMTP id 037F56B0031 for ; Wed, 29 Jan 2014 19:58:42 -0500 (EST) Received: by mail-qc0-f171.google.com with SMTP id n7so4052707qcx.30 for ; Wed, 29 Jan 2014 16:58:42 -0800 (PST) Received: from mx1.redhat.com (mx1.redhat.com. [209.132.183.28]) by mx.google.com with ESMTP id j78si3106282qgd.62.2014.01.29.16.58.42 for ; Wed, 29 Jan 2014 16:58:42 -0800 (PST) Date: Wed, 29 Jan 2014 19:58:36 -0500 (EST) From: Mikulas Patocka Subject: Re: [PATCH v4 1/2] mm: add kstrimdup function In-Reply-To: <1391039304-3172-2-git-send-email-sebastian.capella@linaro.org> Message-ID: References: <1391039304-3172-1-git-send-email-sebastian.capella@linaro.org> <1391039304-3172-2-git-send-email-sebastian.capella@linaro.org> MIME-Version: 1.0 Content-Type: TEXT/PLAIN; charset=US-ASCII Sender: owner-linux-mm@kvack.org List-ID: To: Sebastian Capella Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org, linux-pm@vger.kernel.org, linaro-kernel@lists.linaro.org, patches@linaro.org, Andrew Morton , Michel Lespinasse , Shaohua Li , Jerome Marchand , Joonsoo Kim On Wed, 29 Jan 2014, Sebastian Capella wrote: > kstrimdup will duplicate and trim spaces from the passed in > null terminated string. This is useful for strings coming from > sysfs that often include trailing whitespace due to user input. > > Signed-off-by: Sebastian Capella > Cc: Andrew Morton > Cc: Rik van Riel (commit_signer:5/10=50%) > Cc: Michel Lespinasse > Cc: Shaohua Li > Cc: Jerome Marchand > Cc: Mikulas Patocka > Cc: Joonsoo Kim > --- > include/linux/string.h | 1 + > mm/util.c | 19 +++++++++++++++++++ > 2 files changed, 20 insertions(+) > > diff --git a/include/linux/string.h b/include/linux/string.h > index ac889c5..f29f9a0 100644 > --- a/include/linux/string.h > +++ b/include/linux/string.h > @@ -114,6 +114,7 @@ void *memchr_inv(const void *s, int c, size_t n); > > extern char *kstrdup(const char *s, gfp_t gfp); > extern char *kstrndup(const char *s, size_t len, gfp_t gfp); > +extern char *kstrimdup(const char *s, gfp_t gfp); > extern void *kmemdup(const void *src, size_t len, gfp_t gfp); > > extern char **argv_split(gfp_t gfp, const char *str, int *argcp); > diff --git a/mm/util.c b/mm/util.c > index a24aa22..da17de5 100644 > --- a/mm/util.c > +++ b/mm/util.c > @@ -63,6 +63,25 @@ char *kstrndup(const char *s, size_t max, gfp_t gfp) > EXPORT_SYMBOL(kstrndup); > > /** > + * kstrimdup - Trim and copy a %NUL terminated string. > + * @s: the string to trim and duplicate > + * @gfp: the GFP mask used in the kmalloc() call when allocating memory > + * > + * Returns an address, which the caller must kfree, containing > + * a duplicate of the passed string with leading and/or trailing > + * whitespace (as defined by isspace) removed. It doesn't remove leading whitespace. To remove them, you need to do char *p = strim(ret); memmove(ret, p, strlen(p) + 1); Mikulas > + */ > +char *kstrimdup(const char *s, gfp_t gfp) > +{ > + char *ret = kstrdup(skip_spaces(s), gfp); > + > + if (ret) > + strim(ret); > + return ret; > +} > +EXPORT_SYMBOL(kstrimdup); > + > +/** > * kmemdup - duplicate region of memory > * > * @src: memory region to duplicate > -- > 1.7.9.5 > -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@kvack.org. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: email@kvack.org