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lib/bch.c: use swap() to improve code

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Use the swap() macro to simplify the functions solve_linear_system() and
gf_poly_gcd() and improve their readability.  Remove the local variable
tmp.

Fixes the following three Coccinelle/coccicheck warnings reported by
swap.cocci:

  WARNING opportunity for swap()
  WARNING opportunity for swap()
  WARNING opportunity for swap()

Link: https://lkml.kernel.org/r/20240708224023.9312-2-thorsten.blum@toblux.com
Signed-off-by: Thorsten Blum <thorsten.blum@toblux.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Thorsten Blum 2024-07-09 00:40:24 +02:00 committed by Andrew Morton
parent 4f5d4a1ba7
commit e1fb7430fc
1 changed files with 5 additions and 15 deletions
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20
lib/bch.c
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@ -479,11 +479,8 @@ static int solve_linear_system(struct bch_control *bch, unsigned int *rows,
/* find suitable row for elimination */ /* find suitable row for elimination */
for (r = p; r < m; r++) { for (r = p; r < m; r++) {
if (rows[r] & mask) { if (rows[r] & mask) {
if (r != p) { if (r != p)
tmp = rows[r]; swap(rows[r], rows[p]);
rows[r] = rows[p];
rows[p] = tmp;
}
rem = r+1; rem = r+1;
break; break;
} }
@ -799,21 +796,14 @@ static void gf_poly_div(struct bch_control *bch, struct gf_poly *a,
static struct gf_poly *gf_poly_gcd(struct bch_control *bch, struct gf_poly *a, static struct gf_poly *gf_poly_gcd(struct bch_control *bch, struct gf_poly *a,
struct gf_poly *b) struct gf_poly *b)
{ {
struct gf_poly *tmp;
dbg("gcd(%s,%s)=", gf_poly_str(a), gf_poly_str(b)); dbg("gcd(%s,%s)=", gf_poly_str(a), gf_poly_str(b));
if (a->deg < b->deg) { if (a->deg < b->deg)
tmp = b; swap(a, b);
b = a;
a = tmp;
}
while (b->deg > 0) { while (b->deg > 0) {
gf_poly_mod(bch, a, b, NULL); gf_poly_mod(bch, a, b, NULL);
tmp = b; swap(a, b);
b = a;
a = tmp;
} }
dbg("%s\n", gf_poly_str(a)); dbg("%s\n", gf_poly_str(a));