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| author | nwhitehorn <nwhitehorn@FreeBSD.org> | 2013-09-09 12:45:41 +0000 |
|---|---|---|
| committer | nwhitehorn <nwhitehorn@FreeBSD.org> | 2013-09-09 12:45:41 +0000 |
| commit | 9c7a32d39919735caaff636fa621ee0306559f4b (patch) | |
| tree | 89c01a2fae45fdaf8b8fc05577d2e02e12ee66fd /sys/powerpc/ofw/rtas.c | |
| parent | edb58d082bda05cc6e61498cf95a019950886aa1 (diff) | |
| download | FreeBSD-src-9c7a32d39919735caaff636fa621ee0306559f4b.zip FreeBSD-src-9c7a32d39919735caaff636fa621ee0306559f4b.tar.gz | |
Use a spin lock instead of a mutex to gate RTAS. This is required if RTAS
calls are involved in interrupt handling.
Approved by: re (kib)
Diffstat (limited to 'sys/powerpc/ofw/rtas.c')
| -rw-r--r-- | sys/powerpc/ofw/rtas.c | 6 |
1 files changed, 3 insertions, 3 deletions
diff --git a/sys/powerpc/ofw/rtas.c b/sys/powerpc/ofw/rtas.c index c6d8969..34b7acf 100644 --- a/sys/powerpc/ofw/rtas.c +++ b/sys/powerpc/ofw/rtas.c @@ -93,7 +93,7 @@ rtas_setup(void *junk) return; } - mtx_init(&rtas_mtx, "RTAS", MTX_DEF, 0); + mtx_init(&rtas_mtx, "RTAS", NULL, MTX_SPIN); /* RTAS must be called with everything turned off in MSR */ rtasmsr = mfmsr(); @@ -208,7 +208,7 @@ rtas_call_method(cell_t token, int nargs, int nreturns, ...) args.token = token; va_start(ap, nreturns); - mtx_lock(&rtas_mtx); + mtx_lock_spin(&rtas_mtx); rtas_bounce_offset = 0; args.nargs = nargs; @@ -232,7 +232,7 @@ rtas_call_method(cell_t token, int nargs, int nreturns, ...) __asm __volatile ("sync"); rtas_real_unmap(argsptr, &args, sizeof(args)); - mtx_unlock(&rtas_mtx); + mtx_unlock_spin(&rtas_mtx); if (result < 0) return (result); |
