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authorVineet Gupta <vgupta@synopsys.com>2013-06-22 12:38:59 +0530
committerVineet Gupta <vgupta@synopsys.com>2013-06-22 19:23:26 +0530
commit352c1d95e3220d0ea33cefac5c1f0deb2c4470c6 (patch)
tree2e487e17b6c45610ae819e01be6a7a0f534c35e8 /fs/eventpoll.c
parent359105bdb06f8421fd8e69ae47fd052e398b6778 (diff)
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ARC: stop using pt_regs->orig_r8
Historically, pt_regs have had orig_r8, an overloaded container for (1) backup copy of r8 (syscall number Trap Exceptions) (2) additional system state: (syscall/Exception/Interrupt) There is no point in keeping (1) since syscall number is never clobbered in-place, in pt_regs, unlike r0 which duals as first syscall arg as well as syscall return value and in case of syscall restart, the orig arg0 needs restoring (from orig_r0) after having been updated in-place with syscall ret value. This further paves way to convert (2) to contain ECR itself (rather than current madeup values) Signed-off-by: Vineet Gupta <vgupta@synopsys.com>
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