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lib: bitmap: fold nbits into region struct 

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>
Acked-by: Yury Norov <yury.norov@gmail.com>
Reviewed-by: Andy Shevchenko <andriy.shevchenko@linux.intel.com>
Signed-off-by: Paul Gortmaker <paul.gortmaker@windriver.com>
Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
This commit is contained in:
Paul Gortmaker 2021-02-21 03:08:23 -05:00 committed by Paul E. McKenney
parent 97330db3af
commit 9d7a3366b7
1 changed files with 10 additions and 9 deletions
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19
lib/bitmap.c
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@ -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;
}