diff options
| author | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
|---|---|---|
| committer | André Fabian Silva Delgado <emulatorman@parabola.nu> | 2016-10-20 00:10:27 -0300 |
| commit | d0b2f91bede3bd5e3d24dd6803e56eee959c1797 (patch) | |
| tree | 7fee4ab0509879c373c4f2cbd5b8a5be5b4041ee /arch/s390/mm/page-states.c | |
| parent | e914f8eb445e8f74b00303c19c2ffceaedd16a05 (diff) | |
Linux-libre 4.8.2-gnupck-4.8.2-gnu
Diffstat (limited to 'arch/s390/mm/page-states.c')
| -rw-r--r-- | arch/s390/mm/page-states.c | 13 |
1 files changed, 9 insertions, 4 deletions
diff --git a/arch/s390/mm/page-states.c b/arch/s390/mm/page-states.c index a90d45e9d..3330ea124 100644 --- a/arch/s390/mm/page-states.c +++ b/arch/s390/mm/page-states.c @@ -34,20 +34,25 @@ static int __init cmma(char *str) } __setup("cmma=", cmma); -void __init cmma_init(void) +static inline int cmma_test_essa(void) { register unsigned long tmp asm("0") = 0; register int rc asm("1") = -EOPNOTSUPP; - if (!cmma_flag) - return; asm volatile( " .insn rrf,0xb9ab0000,%1,%1,0,0\n" "0: la %0,0\n" "1:\n" EX_TABLE(0b,1b) : "+&d" (rc), "+&d" (tmp)); - if (rc) + return rc; +} + +void __init cmma_init(void) +{ + if (!cmma_flag) + return; + if (cmma_test_essa()) cmma_flag = 0; } |