diff options
| author | Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com> | 2009-04-14 13:36:16 (GMT) |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2009-04-14 13:37:21 (GMT) |
| commit | 25097bf153391f7be4c591d47061b3dc4990dac2 (patch) | |
| tree | e6fce72c43759d97eb80f0af1ae08c0e6058e6bc /arch/s390/kernel/smp.c | |
| parent | b21597d0268983f8f9e8b563494f75490403e948 (diff) | |
| download | linux-25097bf153391f7be4c591d47061b3dc4990dac2.tar.xz | |
[S390] s390: move machine flags to lowcore
Currently the storage of the machine flags is a globally exported unsigned
long long variable. By moving the storage location into the lowcore struct we
allow assembler code to check machine_flags directly even without needing a
register. Addtionally the lowcore and therefore the machine flags too will be
in cache most of the time.
Signed-off-by: Christian Ehrhardt <ehrhardt@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/smp.c')
| -rw-r--r-- | arch/s390/kernel/smp.c | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c index 006ed50..7966302 100644 --- a/arch/s390/kernel/smp.c +++ b/arch/s390/kernel/smp.c @@ -571,6 +571,7 @@ int __cpuinit __cpu_up(unsigned int cpu) cpu_lowcore->current_task = (unsigned long) idle; cpu_lowcore->cpu_nr = cpu; cpu_lowcore->kernel_asce = S390_lowcore.kernel_asce; + cpu_lowcore->machine_flags = S390_lowcore.machine_flags; eieio(); while (signal_processor(cpu, sigp_restart) == sigp_busy) |