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/mips/jazz/reset.c | 57 ++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 57 insertions(+) create mode 100644 arch/mips/jazz/reset.c (limited to 'arch/mips/jazz/reset.c') diff --git a/arch/mips/jazz/reset.c b/arch/mips/jazz/reset.c new file mode 100644 index 000000000..052b01f5d --- /dev/null +++ b/arch/mips/jazz/reset.c @@ -0,0 +1,57 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Reset a Jazz machine. + * + * We don't trust the firmware so we do it the classic way by poking and + * stabbing at the keyboard controller ... + */ +#include +#include + +#define KBD_STAT_IBF 0x02 /* Keyboard input buffer full */ + +static void jazz_write_output(unsigned char val) +{ + int status; + + do { + status = jazz_kh->command; + } while (status & KBD_STAT_IBF); + jazz_kh->data = val; +} + +static void jazz_write_command(unsigned char val) +{ + int status; + + do { + status = jazz_kh->command; + } while (status & KBD_STAT_IBF); + jazz_kh->command = val; +} + +static unsigned char jazz_read_status(void) +{ + return jazz_kh->command; +} + +static inline void kb_wait(void) +{ + unsigned long start = jiffies; + unsigned long timeout = start + HZ/2; + + do { + if (! (jazz_read_status() & 0x02)) + return; + } while (time_before_eq(jiffies, timeout)); +} + +void jazz_machine_restart(char *command) +{ + while(1) { + kb_wait(); + jazz_write_command(0xd1); + kb_wait(); + jazz_write_output(0x00); + } +} -- cgit v1.3.1