xref: /linux/scripts/atomic/fallbacks/dec_if_positive (revision cdd5b5a9761fd66d17586e4f4ba6588c70e640ea) 
1ace9bad4SMark Rutlandcat <<EOF
2*9257959aSMark Rutland	${int} dec, c = raw_${atomic}_read(v);
3ace9bad4SMark Rutland
4ace9bad4SMark Rutland	do {
5ace9bad4SMark Rutland		dec = c - 1;
6ace9bad4SMark Rutland		if (unlikely(dec < 0))
7ace9bad4SMark Rutland			break;
8*9257959aSMark Rutland	} while (!raw_${atomic}_try_cmpxchg(v, &c, dec));
9ace9bad4SMark Rutland
10ace9bad4SMark Rutland	return dec;
11ace9bad4SMark RutlandEOF
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