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s390: use 64-bit lctlg to load task pid to cr4 on context switch
authorMartin Schwidefsky <schwidefsky@de.ibm.com>
Mon, 3 Apr 2017 11:30:23 +0000 (13:30 +0200)
committerMartin Schwidefsky <schwidefsky@de.ibm.com>
Wed, 5 Apr 2017 05:35:14 +0000 (07:35 +0200)
commitcab36c262ef9a5ddf3c7ae0f8031b191338b3142
tree35160f929d3067f977ec2f7bc700a019792b23d5tree
parent6fb81d69d0bb455e6dbb5bd99529e2dea74b93e7commit | diff
s390: use 64-bit lctlg to load task pid to cr4 on context switch

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>
arch/s390/kernel/entry.S diff | blob | blame | history
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