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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/early.c
parentb21597d0268983f8f9e8b563494f75490403e948 (diff)
downloadlinux-2.6.34-ux500-25097bf153391f7be4c591d47061b3dc4990dac2.tar.gz
[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/early.c')
-rw-r--r--arch/s390/kernel/early.c3
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/s390/kernel/early.c b/arch/s390/kernel/early.c
index 4d221c81c84..d4e1e5b6cfd 100644
--- a/arch/s390/kernel/early.c
+++ b/arch/s390/kernel/early.c
@@ -34,6 +34,8 @@
char kernel_nss_name[NSS_NAME_SIZE + 1];
+static unsigned long machine_flags;
+
static void __init setup_boot_command_line(void);
@@ -391,5 +393,6 @@ void __init startup_init(void)
setup_hpage();
sclp_facilities_detect();
detect_memory_layout(memory_chunk);
+ S390_lowcore.machine_flags = machine_flags;
lockdep_on();
}