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s390/nmi: remove casts

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Remove all the casts to and from the machine check interruption code.
This patch changes struct mci to a union, which contains an anonymous
structure with the already known bits and in addition an unsigned
long field, which contains the raw machine check interruption code.

This allows to simply assign and decoce the interruption code value
without the need for all those casts we had all the time.

Signed-off-by: Heiko Carstens <[email protected]>
Signed-off-by: Martin Schwidefsky <[email protected]>
This commit is contained in:
Heiko Carstens 2015-10-12 13:00:39 +02:00 • committed by Martin Schwidefsky
commit dc6e15556a
3 changed files with 75 additions and 72 deletions
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6
drivers/s390/cio/cio.c
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@ -826,11 +826,11 @@ static atomic_t chpid_reset_count;
static void s390_reset_chpids_mcck_handler(void)
{
struct crw crw;
struct mci *mci;
union mci mci;
/* Check for pending channel report word. */
mci = (struct mci *)&S390_lowcore.mcck_interruption_code;
if (!mci->cp)
mci.val = S390_lowcore.mcck_interruption_code;
if (!mci.cp)
return;
/* Process channel report words. */
while (stcrw(&crw) == 0) {