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3 Commits

Author SHA1 Message Date
Sebastian Andrzej Siewior
f2c5092190 arch/*: Disable softirq stacks on PREEMPT_RT. 
PREEMPT_RT preempts softirqs and the current implementation avoids
do_softirq_own_stack() and only uses __do_softirq().

Disable the unused softirqs stacks on PREEMPT_RT to save some memory and
ensure that do_softirq_own_stack() is not used bwcause it is not expected.

Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
 2022-06-15 17:40:59 +02:00
Heiko Carstens
b8f4c89fd7 s390/softirq: use call_on_stack() macro 
Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
 2021-07-08 22:12:18 +02:00
Heiko Carstens
2ae6521504 s390/irq: inline do_softirq_own_stack() 
Move do_softirq_own_stack() to proper header file so it can be
inlined; saving a few cycles.

Reviewed-by: Sven Schnelle <svens@linux.ibm.com>
Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
 2021-07-08 22:12:17 +02:00