From: Paul Gortmaker <paul.gortmaker@windriver.com>
To: linux-kernel@vger.kernel.org
Cc: lizefan@huawei.com, mingo@kernel.org, tglx@linutronix.de,
josh@joshtriplett.org, yury.norov@gmail.com,
peterz@infradead.org, paulmck@kernel.org, fweisbec@gmail.com,
linux@rasmusvillemoes.dk, andriy.shevchenko@linux.intel.com,
Paul Gortmaker <paul.gortmaker@windriver.com>
Subject: [PATCH 3/8] lib: bitmap: fold nbits into region struct
Date: Tue, 26 Jan 2021 12:11:36 -0500 [thread overview]
Message-ID: <20210126171141.122639-4-paul.gortmaker@windriver.com> (raw)
In-Reply-To: <20210126171141.122639-1-paul.gortmaker@windriver.com>
This will reduce parameter passing and enable using nbits as part
of future dynamic region parameter parsing.
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Suggested-by: Yury Norov <yury.norov@gmail.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
---
lib/bitmap.c | 19 ++++++++++---------
1 file changed, 10 insertions(+), 9 deletions(-)
diff --git a/lib/bitmap.c b/lib/bitmap.c
index 75006c4036e9..162e2850c622 100644
--- a/lib/bitmap.c
+++ b/lib/bitmap.c
@@ -487,24 +487,24 @@ EXPORT_SYMBOL(bitmap_print_to_pagebuf);
/*
* Region 9-38:4/10 describes the following bitmap structure:
- * 0 9 12 18 38
- * .........****......****......****......
- * ^ ^ ^ ^
- * start off group_len end
+ * 0 9 12 18 38 N
+ * .........****......****......****..................
+ * ^ ^ ^ ^ ^
+ * start off group_len end nbits
*/
struct region {
unsigned int start;
unsigned int off;
unsigned int group_len;
unsigned int end;
+ unsigned int nbits;
};
-static int bitmap_set_region(const struct region *r,
- unsigned long *bitmap, int nbits)
+static int bitmap_set_region(const struct region *r, unsigned long *bitmap)
{
unsigned int start;
- if (r->end >= nbits)
+ if (r->end >= r->nbits)
return -ERANGE;
for (start = r->start; start <= r->end; start += r->group_len)
@@ -640,7 +640,8 @@ int bitmap_parselist(const char *buf, unsigned long *maskp, int nmaskbits)
struct region r;
long ret;
- bitmap_zero(maskp, nmaskbits);
+ r.nbits = nmaskbits;
+ bitmap_zero(maskp, r.nbits);
while (buf) {
buf = bitmap_find_region(buf);
@@ -655,7 +656,7 @@ int bitmap_parselist(const char *buf, unsigned long *maskp, int nmaskbits)
if (ret)
return ret;
- ret = bitmap_set_region(&r, maskp, nmaskbits);
+ ret = bitmap_set_region(&r, maskp);
if (ret)
return ret;
}
--
2.17.1
next prev parent reply other threads:[~2021-01-27 0:28 UTC|newest]
Thread overview: 32+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-26 17:11 [PATCH v3 0/8] support for bitmap (and hence CPU) list "N" abbreviation Paul Gortmaker
2021-01-26 17:11 ` [PATCH 1/8] lib: test_bitmap: clearly separate ERANGE from EINVAL tests Paul Gortmaker
2021-01-26 21:04 ` Andy Shevchenko
2021-01-27 7:21 ` Paul Gortmaker
2021-01-26 17:11 ` [PATCH 2/8] lib: test_bitmap: add more start-end:offset/len tests Paul Gortmaker
2021-01-26 21:11 ` Andy Shevchenko
2021-01-27 3:03 ` Yury Norov
2021-01-26 17:11 ` Paul Gortmaker [this message]
2021-01-26 21:16 ` [PATCH 3/8] lib: bitmap: fold nbits into region struct Andy Shevchenko
2021-01-26 21:18 ` Andy Shevchenko
2021-01-27 8:02 ` Paul Gortmaker
2021-01-28 0:47 ` Yury Norov
2021-01-28 10:17 ` Andy Shevchenko
2021-01-27 3:08 ` Yury Norov
2021-01-26 17:11 ` [PATCH 4/8] lib: bitmap: move ERANGE check from set_region to check_region Paul Gortmaker
2021-01-26 21:19 ` Andy Shevchenko
2021-01-27 3:12 ` Yury Norov
2021-01-26 17:11 ` [PATCH 5/8] lib: bitmap_getnum: separate arg into region and field Paul Gortmaker
2021-01-26 21:23 ` Andy Shevchenko
2021-01-27 2:58 ` Yury Norov
2021-01-27 8:38 ` Paul Gortmaker
2021-01-26 17:11 ` [PATCH 6/8] lib: bitmap: support "N" as an alias for size of bitmap Paul Gortmaker
2021-01-26 21:37 ` Andy Shevchenko
2021-01-26 21:41 ` Andy Shevchenko
2021-01-27 17:57 ` Yury Norov
2021-01-27 8:20 ` Paul Gortmaker
2021-01-26 17:11 ` [PATCH 7/8] lib: test_bitmap: add tests for "N" alias Paul Gortmaker
2021-01-26 17:11 ` [PATCH 8/8] rcu: deprecate "all" option to rcu_nocbs= Paul Gortmaker
2021-01-26 21:36 ` Yury Norov
2021-01-26 22:17 ` Paul E. McKenney
2021-01-26 22:27 ` [PATCH v3 0/8] support for bitmap (and hence CPU) list "N" abbreviation Yury Norov
2021-01-27 9:12 ` Paul Gortmaker
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