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arc: Fix zero-overhead loop in fake stackframe

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Fixes incorrect PR #12480
lp_count set to zero doesn't reset zero overhead loops,
it encodes a maximum loopcount.

Signed-off-by: Ruud Derwig <Ruud.Derwig@synopsys.com>
This commit is contained in:
Ruud Derwig 2019-02-04 13:22:51 +01:00 • committed by Anas Nashif
commit fd0a4372b9
1 changed files with 2 additions and 1 deletions
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3
arch/arc/core/regular_irq.S
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@ -200,7 +200,8 @@ _rirq_return_from_coop:
ld_s r0, [r2, _thread_offset_to_return_value] ld_s r0, [r2, _thread_offset_to_return_value]
st_s r0, [sp, ___isf_t_r0_OFFSET] st_s r0, [sp, ___isf_t_r0_OFFSET]
st 0, [sp, ___isf_t_lp_count_OFFSET] /* reset zero-overhead loops */
st 0, [sp, ___isf_t_lp_end_OFFSET]
/* /*
* r13 is part of both the callee and caller-saved register sets because * r13 is part of both the callee and caller-saved register sets because