https://github.com/torvalds/linux
Revision 834da197058bebcb343320dafb8b62d416d4038c authored by Rich Felker on 22 April 2016, 23:29:13 UTC, committed by Rich Felker on 05 August 2016, 03:29:32 UTC
The J-Core cpu has, as an ISA extension, an atomic compare-and-swap
instruction cas.l which applications need to use (instead the imask or
gusa atomic models, which are fundamentally limited to UP) for
synchronization in order to be compatible with SMP systems. Provide a
hwcap flag so that it's possible to do runtime selection and support
both.

Signed-off-by: Rich Felker <dalias@libc.org>
1 parent 5a846ab
History
Tip revision: 834da197058bebcb343320dafb8b62d416d4038c authored by Rich Felker on 22 April 2016, 23:29:13 UTC
sh: add AT_HWCAP flag for J-Core cas.l instruction
Tip revision: 834da19
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