From 59586e5a262a29361c45c929ea3253d4aec830b0 Mon Sep 17 00:00:00 2001 From: "Eric W. Biederman" Date: Tue, 26 Jul 2005 11:36:01 -0600 Subject: [PATCH] Don't export machine_restart, machine_halt, or machine_power_off. machine_restart, machine_halt and machine_power_off are machine specific hooks deep into the reboot logic, that modules have no business messing with. Usually code should be calling kernel_restart, kernel_halt, kernel_power_off, or emergency_restart. So don't export machine_restart, machine_halt, and machine_power_off so we can catch buggy users. Signed-off-by: Eric W. Biederman Signed-off-by: Linus Torvalds --- arch/m32r/kernel/process.c | 6 ------ 1 file changed, 6 deletions(-) (limited to 'arch/m32r/kernel') diff --git a/arch/m32r/kernel/process.c b/arch/m32r/kernel/process.c index b556c3cf6495..ea13a8f4d8b0 100644 --- a/arch/m32r/kernel/process.c +++ b/arch/m32r/kernel/process.c @@ -115,8 +115,6 @@ void machine_restart(char *__unused) cpu_relax(); } -EXPORT_SYMBOL(machine_restart); - void machine_halt(void) { printk("Please push reset button!\n"); @@ -124,15 +122,11 @@ void machine_halt(void) cpu_relax(); } -EXPORT_SYMBOL(machine_halt); - void machine_power_off(void) { /* M32R_FIXME */ } -EXPORT_SYMBOL(machine_power_off); - static int __init idle_setup (char *str) { if (!strncmp(str, "poll", 4)) { -- cgit v1.2.2 From 2757a71c3122c7653e3dd8077ad6ca71efb1d450 Mon Sep 17 00:00:00 2001 From: Hirokazu Takata Date: Mon, 1 Aug 2005 21:11:35 -0700 Subject: [PATCH] m32r: Fix local-timer event handling There was a scheduling problem of the m32r SMP kernel; A process rarely stopped and gave no responding but the other process have been handled by the other CPU still lives, then if we did something in the other terminal or something like that, the stopped process came back to life and continued its operation... (ex. LMbench: lat_sig) In the m32r SMP kernel, a local-timer event is delivered by using an IPI(inter processor interrupts); LOCAL_TIMER_IPI. And a function smp_send_timer() is prepared to send the LOCAL_TIMER_IPI from the current CPU to the other CPUs. The funtion smp_send_timer() was placed and used in do_IRQ() in former times (before 2.6.10-rc3-mm1 kernel), however, it was unintentionally removed when arch/m32r/kernel/irq.c was modified to employ the generic hardirq framework (CONFIG_GENERIC_HARDIRQ) in my previous patch. [PATCH 2.6.10-rc3-mm1] m32r: Use generic hardirq framework http://www.ussg.iu.edu/hypermail/linux/kernel/0412.2/0358.html The following patch fixes the above problem. Signed-off-by: Hitoshi Yamamoto Signed-off-by: Hirokazu Takata Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/kernel/time.c | 13 ++++--------- 1 file changed, 4 insertions(+), 9 deletions(-) (limited to 'arch/m32r/kernel') diff --git a/arch/m32r/kernel/time.c b/arch/m32r/kernel/time.c index 3c4707280a52..8a2b77bc5749 100644 --- a/arch/m32r/kernel/time.c +++ b/arch/m32r/kernel/time.c @@ -205,8 +205,7 @@ static long last_rtc_update = 0; * timer_interrupt() needs to keep up the real-time clock, * as well as call the "do_timer()" routine every clocktick */ -static inline void -do_timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) +irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) { #ifndef CONFIG_SMP profile_tick(CPU_PROFILING, regs); @@ -221,6 +220,7 @@ do_timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) * CMOS clock accordingly every ~11 minutes. Set_rtc_mmss() has to be * called as close as possible to 500 ms before the new second starts. */ + write_seqlock(&xtime_lock); if ((time_status & STA_UNSYNC) == 0 && xtime.tv_sec > last_rtc_update + 660 && (xtime.tv_nsec / 1000) >= 500000 - ((unsigned)TICK_SIZE) / 2 @@ -231,6 +231,7 @@ do_timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) else /* do it again in 60 s */ last_rtc_update = xtime.tv_sec - 600; } + write_sequnlock(&xtime_lock); /* As we return to user mode fire off the other CPU schedulers.. this is basically because we don't yet share IRQ's around. This message is rigged to be safe on the 386 - basically it's @@ -238,14 +239,8 @@ do_timer_interrupt(int irq, void *dev_id, struct pt_regs * regs) #ifdef CONFIG_SMP smp_local_timer_interrupt(regs); + smp_send_timer(); #endif -} - -irqreturn_t timer_interrupt(int irq, void *dev_id, struct pt_regs *regs) -{ - write_seqlock(&xtime_lock); - do_timer_interrupt(irq, NULL, regs); - write_sequnlock(&xtime_lock); return IRQ_HANDLED; } -- cgit v1.2.2