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| author | Christian Borntraeger <borntraeger@de.ibm.com> | 2016-09-12 13:13:38 +0200 |
|---|---|---|
| committer | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2016-09-20 14:26:01 +0200 |
| commit | 9078a54996a0989e25a04bbb9276bc340a52a673 (patch) | |
| tree | a3501e4b20c6b146900a906bdd4344dfffc534b0 /arch/s390/Kconfig | |
| parent | c783b91ebdbab67e848889c29dd0611c2b2c9fea (diff) | |
s390: claim efficient unaligned access
most unaligned accesses are reasonable efficient (no kernel emulation)
on s390, let's announce it
This also
- removes the ubsan false positives for unaligned accesses on s390 with
default config
- uses simpler arithmetic in several functions in several other areas
of the kernel like ethernet frame classification
Signed-off-by: Christian Borntraeger <borntraeger@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Diffstat (limited to 'arch/s390/Kconfig')
| -rw-r--r-- | arch/s390/Kconfig | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index e751fe25d6ab..f4989fb4ac8d 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -137,6 +137,7 @@ config S390 select HAVE_DMA_API_DEBUG select HAVE_DYNAMIC_FTRACE select HAVE_DYNAMIC_FTRACE_WITH_REGS + select HAVE_EFFICIENT_UNALIGNED_ACCESS select HAVE_EXIT_THREAD select HAVE_FTRACE_MCOUNT_RECORD select HAVE_FUNCTION_GRAPH_TRACER |