Commit c11eb222 authored Sep 26, 2013 by Mischa Jonker Committed by Vineet Gupta Sep 27, 2013

ARC: Handle zero-overhead-loop in unaligned access handler



If a load or store is the last instruction in a zero-overhead-loop, and
it's misaligned, the loop would execute only once.

This fixes that problem.

Signed-off-by: Mischa Jonker <mjonker@synopsys.com>
Signed-off-by: Vineet Gupta <vgupta@synopsys.com>

parent 4a10c2ac

arch/arc/kernel/unaligned.c

+6 −0

Original line number	Diff line number	Diff line
		@@ -245,6 +245,12 @@ int misaligned_fixup(unsigned long address, struct pt_regs *regs,
		regs->status32 &= ~STATUS_DE_MASK;
		} else {
		regs->ret += state.instr_len;

		/* handle zero-overhead-loop */
		if ((regs->ret == regs->lp_end) && (regs->lp_count)) {
		regs->ret = regs->lp_start;
		regs->lp_count--;
		}
		}

		return 0;

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