kernel-ark/arch/s390
Hisashi Hifumi 894cdde26b [S390] do local_irq_restore while spinning in spin_lock_irqsave.
In s390's spin_lock_irqsave, interrupts remain disabled while
spinning. In other architectures like x86 and powerpc, interrupts are
re-enabled while spinning if IRQ is not masked before spin_lock_irqsave
is called.

The following patch re-enables interrupts through local_irq_restore
while spinning for a lock acquisition.
This can improve system response.

[heiko.carstens@de.ibm.com: removed saving of pc]

Signed-off-by: Hisashi Hifumi <hifumi.hisashi@oss.ntt.co.jp>
Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2008-01-26 14:11:31 +01:00
..
appldata [S390] appldata: remove unused binary sysctls. 2007-11-20 11:13:45 +01:00
boot
crypto [S390] arch/s390/: Spelling fixes 2008-01-26 14:11:24 +01:00
hypfs Kobject: convert arch/* from kobject_unregister() to kobject_put() 2008-01-24 20:40:39 -08:00
kernel [S390] add smp_call_function_mask 2008-01-26 14:11:31 +01:00
lib [S390] do local_irq_restore while spinning in spin_lock_irqsave. 2008-01-26 14:11:31 +01:00
math-emu [S390] Calibrate delay and bogomips. 2007-02-05 21:18:31 +01:00
mm [S390] vmemmap: allocate struct pages before 1:1 mapping 2008-01-26 14:11:23 +01:00
oprofile Combine instrumentation menus in kernel/Kconfig.instrumentation 2007-10-19 11:53:54 -07:00
defconfig [S390] Update default configuration. 2007-10-22 12:52:46 +02:00
Kconfig [S390] Get rid of HOLES_IN_ZONE requirement. 2008-01-26 14:11:13 +01:00
Kconfig.debug
Makefile kbuild: enable 'make AFLAGS=...' to add additional options to AS 2007-10-15 21:59:31 +02:00