s390: use 64-bit lctlg to load task pid to cr4 on context switch

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The 32-bit lctl instruction is quite a bit slower than the 64-bit
counter part lctlg. Use the faster instruction.

Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

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Martin Schwidefsky 2017-04-03 13:30:23 +02:00

parent 6fb81d69d0

commit cab36c262e

1 changed files with 3 additions and 1 deletions

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arch/s390/kernel/entry.S

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