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authorChristian Ehrhardt <ehrhardt@linux.vnet.ibm.com>2009-04-14 15:36:16 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2009-04-14 15:37:21 +0200
commit25097bf153391f7be4c591d47061b3dc4990dac2 (patch)
treee6fce72c43759d97eb80f0af1ae08c0e6058e6bc /arch/s390/kernel/setup.c
parentb21597d0268983f8f9e8b563494f75490403e948 (diff)
[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/setup.c')
-rw-r--r--arch/s390/kernel/setup.c4
1 files changed, 1 insertions, 3 deletions
diff --git a/arch/s390/kernel/setup.c b/arch/s390/kernel/setup.c
index 06201b93cbb..163bdfe5a6b 100644
--- a/arch/s390/kernel/setup.c
+++ b/arch/s390/kernel/setup.c
@@ -82,9 +82,6 @@ EXPORT_SYMBOL(console_devno);
unsigned int console_irq = -1;
EXPORT_SYMBOL(console_irq);
-unsigned long machine_flags;
-EXPORT_SYMBOL(machine_flags);
-
unsigned long elf_hwcap = 0;
char elf_platform[ELF_PLATFORM_SIZE];
@@ -426,6 +423,7 @@ setup_lowcore(void)
__alloc_bootmem(PAGE_SIZE, PAGE_SIZE, 0) + PAGE_SIZE;
lc->current_task = (unsigned long) init_thread_union.thread_info.task;
lc->thread_info = (unsigned long) &init_thread_union;
+ lc->machine_flags = S390_lowcore.machine_flags;
#ifndef CONFIG_64BIT
if (MACHINE_HAS_IEEE) {
lc->extended_save_area_addr = (__u32)