From: Yury Norov <yury.norov@gmail.com>
To: Andrew Morton <akpm@linux-foundation.org>,
Andy Shevchenko <andriy.shevchenko@linux.intel.com>,
Arnd Bergmann <arnd@arndb.de>,
Dmitry Torokhov <dmitry.torokhov@gmail.com>,
Kees Cook <keescook@chromium.org>,
Matthew Wilcox <willy@infradead.org>,
Michael Ellerman <mpe@ellerman.id.au>,
Rasmus Villemoes <linux@rasmusvillemoes.dk>,
Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp>
Cc: Yury Norov <ynorov@marvell.com>,
linux-kernel@vger.kernel.org, Yury Norov <yury.norov@gmail.com>
Subject: [PATCH 1/6] bitmap_parselist: don't calculate length of the input string
Date: Wed, 20 Feb 2019 11:37:00 +0300 [thread overview]
Message-ID: <20190220083705.14050-2-ynorov@marvell.com> (raw)
In-Reply-To: <20190220083705.14050-1-ynorov@marvell.com>
bitmap_parselist() calculates length of the input string before passing
it to the __bitmap_parselist(). But the end-of-line condition is checked
for every character in __bitmap_parselist() anyway. So doing it in wrapper
is a simple waste of time.
Signed-off-by: Yury Norov <ynorov@marvell.com>
---
lib/bitmap.c | 5 +----
1 file changed, 1 insertion(+), 4 deletions(-)
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 98872e9025da..ad1fb7e6ad0e 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -614,10 +614,7 @@ static int __bitmap_parselist(const char *buf, unsigned int buflen,
int bitmap_parselist(const char *bp, unsigned long *maskp, int nmaskbits)
{
- char *nl = strchrnul(bp, '\n');
- int len = nl - bp;
-
- return __bitmap_parselist(bp, len, 0, maskp, nmaskbits);
+ return __bitmap_parselist(bp, UINT_MAX, 0, maskp, nmaskbits);
}
EXPORT_SYMBOL(bitmap_parselist);
--
2.17.1
next prev parent reply other threads:[~2019-02-20 8:37 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-02-20 8:36 [PATCH v2 0/5] lib: rework bitmap_parselist and tests Yury Norov
2019-02-20 8:37 ` Yury Norov [this message]
2019-02-20 8:37 ` [PATCH 2/6] bitmap_parselist: move non-parser logic to helpers Yury Norov
2019-02-20 8:37 ` [PATCH 3/6] bitmap_parselist: rework input string parser Yury Norov
2019-02-20 8:37 ` [PATCH 4/6] lib/test_bitmap: switch test_bitmap_parselist to ktime_get() Yury Norov
2019-02-20 13:51 ` Andy Shevchenko
2019-02-20 13:52 ` Andy Shevchenko
2019-02-20 14:20 ` Yury Norov
2019-02-20 23:10 ` Palmer Dabbelt
2019-02-21 8:53 ` Yury Norov
2019-02-21 12:55 ` Yury Norov
2019-02-20 8:37 ` [PATCH 5/6] lib/test_bitmap: add testcases for bitmap_parselist Yury Norov
2019-02-20 8:37 ` [PATCH 6/6] lib/test_bitmap: add tests for bitmap_parselist_user Yury Norov
2019-03-15 15:53 ` [PATCH v2 0/5] lib: rework bitmap_parselist and tests Yury Norov
2019-03-25 21:07 [PATCH v2 RESEND 0/6] " Yury Norov
2019-03-25 21:07 ` [PATCH 1/6] bitmap_parselist: don't calculate length of the input string Yury Norov
2019-03-26 10:09 ` Andy Shevchenko
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