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authorMichael Holzheu <holzheu@linux.vnet.ibm.com>2012-03-11 11:59:28 -0400
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2012-03-11 11:59:28 -0400
commitb43445ff6c514822979cc9ae02c76f98bf68721c (patch)
tree4c6099a6065a5af03e85247daf929c10a88d30f6 /arch/s390/kernel/ipl.c
parent4c1051e37a0e2a941115c6fb7ba08c318f25a0f9 (diff)
[S390] Use copy_to_absolute_zero() instead of "stura/sturg"
Use the new copy_to_absolute_zero() function instead of manual "stura" and "sturg" to make the code shorter and more readable. Signed-off-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/ipl.c')
-rw-r--r--arch/s390/kernel/ipl.c30
1 files changed, 6 insertions, 24 deletions
diff --git a/arch/s390/kernel/ipl.c b/arch/s390/kernel/ipl.c
index e5a72a2b0c56..9e2f6f7c0e5a 100644
--- a/arch/s390/kernel/ipl.c
+++ b/arch/s390/kernel/ipl.c
@@ -1498,30 +1498,12 @@ static struct shutdown_action __refdata dump_action = {
static void dump_reipl_run(struct shutdown_trigger *trigger)
{
- preempt_disable();
- /*
- * Bypass dynamic address translation (DAT) when storing IPL parameter
- * information block address and checksum into the prefix area
- * (corresponding to absolute addresses 0-8191).
- * When enhanced DAT applies and the STE format control in one,
- * the absolute address is formed without prefixing. In this case a
- * normal store (stg/st) into the prefix area would no more match to
- * absolute addresses 0-8191.
- */
-#ifdef CONFIG_64BIT
- asm volatile("sturg %0,%1"
- :: "a" ((unsigned long) reipl_block_actual),
- "a" (&lowcore_ptr[smp_processor_id()]->ipib));
-#else
- asm volatile("stura %0,%1"
- :: "a" ((unsigned long) reipl_block_actual),
- "a" (&lowcore_ptr[smp_processor_id()]->ipib));
-#endif
- asm volatile("stura %0,%1"
- :: "a" (csum_partial(reipl_block_actual,
- reipl_block_actual->hdr.len, 0)),
- "a" (&lowcore_ptr[smp_processor_id()]->ipib_checksum));
- preempt_enable();
+ u32 csum;
+
+ csum = csum_partial(reipl_block_actual, reipl_block_actual->hdr.len, 0);
+ copy_to_absolute_zero(&S390_lowcore.ipib_checksum, &csum, sizeof(csum));
+ copy_to_absolute_zero(&S390_lowcore.ipib, &reipl_block_actual,
+ sizeof(reipl_block_actual));
dump_run(trigger);
}