From a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 Mon Sep 17 00:00:00 2001 From: Breno Leitao Date: Wed, 5 Aug 2026 07:52:36 -0700 Subject: workqueue: skip the node_nr_active update for non-unbound workqueues apply_wqattrs_commit() updates node_nr_active->max unconditionally. wq->node_nr_active[] is only allocated for unbound workqueues, so guard the call before per-cpu workqueues start using this path. No functional change: only unbound workqueues reach apply_wqattrs_*() today. Signed-off-by: Breno Leitao Signed-off-by: Tejun Heo --- arch/sh/lib/delay.c | 54 +++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 54 insertions(+) create mode 100644 arch/sh/lib/delay.c (limited to 'arch/sh/lib/delay.c') diff --git a/arch/sh/lib/delay.c b/arch/sh/lib/delay.c new file mode 100644 index 000000000..dad8e6a54 --- /dev/null +++ b/arch/sh/lib/delay.c @@ -0,0 +1,54 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Precise Delay Loops for SuperH + * + * Copyright (C) 1999 Niibe Yutaka & Kaz Kojima + */ + +#include +#include + +void __delay(unsigned long loops) +{ + __asm__ __volatile__( + /* + * ST40-300 appears to have an issue with this code, + * normally taking two cycles each loop, as with all + * other SH variants. If however the branch and the + * delay slot straddle an 8 byte boundary, this increases + * to 3 cycles. + * This align directive ensures this doesn't occur. + */ + ".balign 8\n\t" + + "tst %0, %0\n\t" + "1:\t" + "bf/s 1b\n\t" + " dt %0" + : "=r" (loops) + : "0" (loops) + : "t"); +} + +inline void __const_udelay(unsigned long xloops) +{ + xloops *= 4; + __asm__("dmulu.l %0, %2\n\t" + "sts mach, %0" + : "=r" (xloops) + : "0" (xloops), + "r" (cpu_data[raw_smp_processor_id()].loops_per_jiffy * (HZ/4)) + : "macl", "mach"); + __delay(++xloops); +} + +void __udelay(unsigned long usecs) +{ + __const_udelay(usecs * 0x000010c6); /* 2**32 / 1000000 */ +} + +void __ndelay(unsigned long nsecs) +{ + __const_udelay(nsecs * 0x00000005); +} + -- cgit v1.3.1