diff options
| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-05-27 14:40:39 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2014-05-28 10:39:16 +0200 |
| commit | 63aef00b55d37e9fad837a8b38a2c261f0d32041 (patch) | |
| tree | 3cc75663f7b7aef3e303d440a927488e3660657e /drivers/s390/cio/cio.c | |
| parent | 993072ee67aa179c48c85eb19869804e68887d86 (diff) | |
s390/lowcore: replace lowcore irb array with a per-cpu variable
Remove the 96-byte irb array from the lowcore and create a per-cpu
variable instead. That way we will pick up any change in the definition
of the struct irb automatically.
Acked-By: Sebastian Ott <sebott@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'drivers/s390/cio/cio.c')
| -rw-r--r-- | drivers/s390/cio/cio.c | 9 |
1 files changed, 6 insertions, 3 deletions
diff --git a/drivers/s390/cio/cio.c b/drivers/s390/cio/cio.c index 9e058c4657a3..77f9c92df4b9 100644 --- a/drivers/s390/cio/cio.c +++ b/drivers/s390/cio/cio.c @@ -46,6 +46,9 @@ debug_info_t *cio_debug_msg_id; debug_info_t *cio_debug_trace_id; debug_info_t *cio_debug_crw_id; +DEFINE_PER_CPU_ALIGNED(struct irb, cio_irb); +EXPORT_PER_CPU_SYMBOL(cio_irb); + /* * Function: cio_debug_init * Initializes three debug logs for common I/O: @@ -560,7 +563,7 @@ static irqreturn_t do_cio_interrupt(int irq, void *dummy) __this_cpu_write(s390_idle.nohz_delay, 1); tpi_info = (struct tpi_info *) &get_irq_regs()->int_code; - irb = (struct irb *) &S390_lowcore.irb; + irb = &__get_cpu_var(cio_irb); sch = (struct subchannel *)(unsigned long) tpi_info->intparm; if (!sch) { /* Clear pending interrupt condition. */ @@ -609,7 +612,7 @@ void cio_tsch(struct subchannel *sch) struct irb *irb; int irq_context; - irb = (struct irb *)&S390_lowcore.irb; + irb = &__get_cpu_var(cio_irb); /* Store interrupt response block to lowcore. */ if (tsch(sch->schid, irb) != 0) /* Not status pending or not operational. */ @@ -746,7 +749,7 @@ __clear_io_subchannel_easy(struct subchannel_id schid) struct tpi_info ti; if (tpi(&ti)) { - tsch(ti.schid, (struct irb *)&S390_lowcore.irb); + tsch(ti.schid, &__get_cpu_var(cio_irb)); if (schid_equal(&ti.schid, &schid)) return 0; } |