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lib: Only test atomic64_dec_if_positive on archs having it 

Currently atomic64_dec_if_positive() is only supported by PowerPC,
MIPS and x86-32.

Signed-off-by: Luca Barbieri <luca@luca-barbieri.com>
LKML-Reference: <1267183361-20775-1-git-send-email-luca@luca-barbieri.com>
Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
Luca Barbieri 2010-02-26 12:22:40 +01:00 committed by H. Peter Anvin
parent a7e926abc3
commit 8f4f202b33
1 changed files with 4 additions and 0 deletions
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4
lib/atomic64_test.c
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@ -112,6 +112,7 @@ static __init int test_atomic64(void)
r += one;
BUG_ON(v.counter != r);
#if defined(CONFIG_X86_32) || defined(CONFIG_MIPS) || defined(CONFIG_PPC) || defined(_ASM_GENERIC_ATOMIC64_H)
INIT(onestwos);
BUG_ON(atomic64_dec_if_positive(&v) != (onestwos - 1));
r -= one;
@ -124,6 +125,9 @@ static __init int test_atomic64(void)
INIT(-one);
BUG_ON(atomic64_dec_if_positive(&v) != (-one - one));
BUG_ON(v.counter != r);
#else
#warning Please implement atomic64_dec_if_positive for your architecture, and add it to the IF above
#endif
INIT(onestwos);
BUG_ON(atomic64_inc_not_zero(&v));