James Morse 971c67ce37 arm64: reduce stack use in irq_handler ... The code for switching to irq_stack stores three pieces of information on the stack, fp+lr, as a fake stack frame (that lets us walk back onto the interrupted tasks stack frame), and the address of the struct pt_regs that contains the register values from kernel entry. (which dump_backtrace() will print in any stack trace). To reduce this, we store fp, and the pointer to the struct pt_regs. unwind_frame() can recognise this as the irq_stack dummy frame, (as it only appears at the top of the irq_stack), and use the struct pt_regs values to find the missing interrupted link-register. Suggested-by: Will Deacon <will.deacon@arm.com> Signed-off-by: James Morse <james.morse@arm.com> Signed-off-by: Will Deacon <will.deacon@arm.com>		2015-12-15 17:09:08 +00:00
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asm	arm64: reduce stack use in irq_handler	2015-12-15 17:09:08 +00:00
uapi/asm	arm64 fixes and clean-ups:	2015-11-12 15:33:11 -08:00