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| author | Paul Gortmaker <paul.gortmaker@windriver.com> | 2021-02-21 09:08:24 +0100 |
|---|---|---|
| committer | Paul E. McKenney <paulmck@kernel.org> | 2021-03-08 23:16:58 +0100 |
| commit | f3c869caef648c541a7445f2a6ba2196d343f542 (patch) | |
| tree | 753e333b60fb43b38cc86baf2f82a3f91d6697e4 | |
| parent | lib: bitmap: fold nbits into region struct (diff) | |
| download | linux-f3c869caef648c541a7445f2a6ba2196d343f542.tar.xz linux-f3c869caef648c541a7445f2a6ba2196d343f542.zip | |
lib: bitmap: move ERANGE check from set_region to check_region
It makes sense to do all the checks in check_region() and not 1/2
in check_region and 1/2 in set_region.
Since set_region is called immediately after check_region, the net
effect on runtime is zero, but it gets rid of an if (...) return...
Cc: Yury Norov <yury.norov@gmail.com>
Cc: Rasmus Villemoes <linux@rasmusvillemoes.dk>
Cc: Andy Shevchenko <andriy.shevchenko@linux.intel.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>
| -rw-r--r-- | lib/bitmap.c | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/lib/bitmap.c b/lib/bitmap.c index 162e2850c622..833f152a2c43 100644 --- a/lib/bitmap.c +++ b/lib/bitmap.c @@ -500,17 +500,12 @@ struct region { unsigned int nbits; }; -static int bitmap_set_region(const struct region *r, unsigned long *bitmap) +static void bitmap_set_region(const struct region *r, unsigned long *bitmap) { unsigned int start; - if (r->end >= r->nbits) - return -ERANGE; - for (start = r->start; start <= r->end; start += r->group_len) bitmap_set(bitmap, start, min(r->end - start + 1, r->off)); - - return 0; } static int bitmap_check_region(const struct region *r) @@ -518,6 +513,9 @@ static int bitmap_check_region(const struct region *r) if (r->start > r->end || r->group_len == 0 || r->off > r->group_len) return -EINVAL; + if (r->end >= r->nbits) + return -ERANGE; + return 0; } @@ -656,9 +654,7 @@ int bitmap_parselist(const char *buf, unsigned long *maskp, int nmaskbits) if (ret) return ret; - ret = bitmap_set_region(&r, maskp); - if (ret) - return ret; + bitmap_set_region(&r, maskp); } return 0; |