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author | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-01 20:48:54 -0700 |
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committer | Linus Torvalds <torvalds@woody.linux-foundation.org> | 2007-08-01 20:48:54 -0700 |
commit | 1ed4395035a6791ebbbf618429a58ab9c207cc83 (patch) | |
tree | a34158c5dd3c4ca70f140da5a484ca6142a3b8c3 /arch/ia64/kernel | |
parent | 878701db07db3f0b59f14f0c525b681e4ca81551 (diff) | |
parent | b718f91c14604e4ab5cdfe8d3baff8111425ea7d (diff) | |
download | linux-stable-1ed4395035a6791ebbbf618429a58ab9c207cc83.tar.gz linux-stable-1ed4395035a6791ebbbf618429a58ab9c207cc83.tar.bz2 linux-stable-1ed4395035a6791ebbbf618429a58ab9c207cc83.zip |
Merge branch 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6
* 'release' of git://git.kernel.org/pub/scm/linux/kernel/git/aegl/linux-2.6:
[IA64] ITC: Reduce rating for ITC clock if ITCs are drifty
[IA64] SN2: Fix up sn2_rtc clock
[IA64] Fix wrong access to irq_desc[] in iosapic_register_intr().
[IA64] Fix possible race in destroy_and_reserve_irq()
[IA64] Fix registered interrupt check
[IA64] Remove a few duplicate includes
[IA64] Allow smp_call_function_single() to current cpu
[IA64] fix a few section mismatch warnings
Diffstat (limited to 'arch/ia64/kernel')
-rw-r--r-- | arch/ia64/kernel/iosapic.c | 19 | ||||
-rw-r--r-- | arch/ia64/kernel/irq_ia64.c | 17 | ||||
-rw-r--r-- | arch/ia64/kernel/mca.c | 17 | ||||
-rw-r--r-- | arch/ia64/kernel/setup.c | 1 | ||||
-rw-r--r-- | arch/ia64/kernel/smp.c | 8 | ||||
-rw-r--r-- | arch/ia64/kernel/time.c | 16 |
6 files changed, 47 insertions, 31 deletions
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c index 91e6dc1e7baf..cfe4654838f4 100644 --- a/arch/ia64/kernel/iosapic.c +++ b/arch/ia64/kernel/iosapic.c @@ -142,7 +142,7 @@ struct iosapic_rte_info { static struct iosapic_intr_info { struct list_head rtes; /* RTEs using this vector (empty => * not an IOSAPIC interrupt) */ - int count; /* # of RTEs that shares this vector */ + int count; /* # of registered RTEs */ u32 low32; /* current value of low word of * Redirection table entry */ unsigned int dest; /* destination CPU physical ID */ @@ -313,7 +313,7 @@ mask_irq (unsigned int irq) int rte_index; struct iosapic_rte_info *rte; - if (list_empty(&iosapic_intr_info[irq].rtes)) + if (!iosapic_intr_info[irq].count) return; /* not an IOSAPIC interrupt! */ /* set only the mask bit */ @@ -331,7 +331,7 @@ unmask_irq (unsigned int irq) int rte_index; struct iosapic_rte_info *rte; - if (list_empty(&iosapic_intr_info[irq].rtes)) + if (!iosapic_intr_info[irq].count) return; /* not an IOSAPIC interrupt! */ low32 = iosapic_intr_info[irq].low32 &= ~IOSAPIC_MASK; @@ -363,7 +363,7 @@ iosapic_set_affinity (unsigned int irq, cpumask_t mask) dest = cpu_physical_id(first_cpu(mask)); - if (list_empty(&iosapic_intr_info[irq].rtes)) + if (!iosapic_intr_info[irq].count) return; /* not an IOSAPIC interrupt */ set_irq_affinity_info(irq, dest, redir); @@ -542,7 +542,7 @@ iosapic_reassign_vector (int irq) { int new_irq; - if (!list_empty(&iosapic_intr_info[irq].rtes)) { + if (iosapic_intr_info[irq].count) { new_irq = create_irq(); if (new_irq < 0) panic("%s: out of interrupt vectors!\n", __FUNCTION__); @@ -560,7 +560,7 @@ iosapic_reassign_vector (int irq) } } -static struct iosapic_rte_info *iosapic_alloc_rte (void) +static struct iosapic_rte_info * __init_refok iosapic_alloc_rte (void) { int i; struct iosapic_rte_info *rte; @@ -677,7 +677,7 @@ get_target_cpu (unsigned int gsi, int irq) * In case of vector shared by multiple RTEs, all RTEs that * share the vector need to use the same destination CPU. */ - if (!list_empty(&iosapic_intr_info[irq].rtes)) + if (iosapic_intr_info[irq].count) return iosapic_intr_info[irq].dest; /* @@ -794,8 +794,9 @@ iosapic_register_intr (unsigned int gsi, err = register_intr(gsi, irq, IOSAPIC_LOWEST_PRIORITY, polarity, trigger); if (err < 0) { + spin_unlock(&irq_desc[irq].lock); irq = err; - goto unlock_all; + goto unlock_iosapic_lock; } /* @@ -811,7 +812,7 @@ iosapic_register_intr (unsigned int gsi, gsi, (trigger == IOSAPIC_EDGE ? "edge" : "level"), (polarity == IOSAPIC_POL_HIGH ? "high" : "low"), cpu_logical_id(dest), dest, irq_to_vector(irq)); - unlock_all: + spin_unlock(&irq_desc[irq].lock); unlock_iosapic_lock: spin_unlock_irqrestore(&iosapic_lock, flags); diff --git a/arch/ia64/kernel/irq_ia64.c b/arch/ia64/kernel/irq_ia64.c index 9386b955eed1..c47c8acc96e3 100644 --- a/arch/ia64/kernel/irq_ia64.c +++ b/arch/ia64/kernel/irq_ia64.c @@ -101,15 +101,6 @@ int check_irq_used(int irq) return -1; } -static void reserve_irq(unsigned int irq) -{ - unsigned long flags; - - spin_lock_irqsave(&vector_lock, flags); - irq_status[irq] = IRQ_RSVD; - spin_unlock_irqrestore(&vector_lock, flags); -} - static inline int find_unassigned_irq(void) { int irq; @@ -302,10 +293,14 @@ static cpumask_t vector_allocation_domain(int cpu) void destroy_and_reserve_irq(unsigned int irq) { + unsigned long flags; + dynamic_irq_cleanup(irq); - clear_irq_vector(irq); - reserve_irq(irq); + spin_lock_irqsave(&vector_lock, flags); + __clear_irq_vector(irq); + irq_status[irq] = IRQ_RSVD; + spin_unlock_irqrestore(&vector_lock, flags); } static int __reassign_irq_vector(int irq, int cpu) diff --git a/arch/ia64/kernel/mca.c b/arch/ia64/kernel/mca.c index 4b5daa3cc0fe..ff28620cb992 100644 --- a/arch/ia64/kernel/mca.c +++ b/arch/ia64/kernel/mca.c @@ -1750,8 +1750,17 @@ format_mca_init_stack(void *mca_data, unsigned long offset, strncpy(p->comm, type, sizeof(p->comm)-1); } -/* Do per-CPU MCA-related initialization. */ +/* Caller prevents this from being called after init */ +static void * __init_refok mca_bootmem(void) +{ + void *p; + p = alloc_bootmem(sizeof(struct ia64_mca_cpu) * NR_CPUS + + KERNEL_STACK_SIZE); + return (void *)ALIGN((unsigned long)p, KERNEL_STACK_SIZE); +} + +/* Do per-CPU MCA-related initialization. */ void __cpuinit ia64_mca_cpu_init(void *cpu_data) { @@ -1763,11 +1772,7 @@ ia64_mca_cpu_init(void *cpu_data) int cpu; first_time = 0; - mca_data = alloc_bootmem(sizeof(struct ia64_mca_cpu) - * NR_CPUS + KERNEL_STACK_SIZE); - mca_data = (void *)(((unsigned long)mca_data + - KERNEL_STACK_SIZE - 1) & - (-KERNEL_STACK_SIZE)); + mca_data = mca_bootmem(); for (cpu = 0; cpu < NR_CPUS; cpu++) { format_mca_init_stack(mca_data, offsetof(struct ia64_mca_cpu, mca_stack), diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c index 7cecd2964200..cd9a37a552c3 100644 --- a/arch/ia64/kernel/setup.c +++ b/arch/ia64/kernel/setup.c @@ -60,7 +60,6 @@ #include <asm/smp.h> #include <asm/system.h> #include <asm/unistd.h> -#include <asm/system.h> #if defined(CONFIG_SMP) && (IA64_CPU_SIZE > PAGE_SIZE) # error "struct cpuinfo_ia64 too big!" diff --git a/arch/ia64/kernel/smp.c b/arch/ia64/kernel/smp.c index 0982882bfb80..4e446aa5f4ac 100644 --- a/arch/ia64/kernel/smp.c +++ b/arch/ia64/kernel/smp.c @@ -346,7 +346,7 @@ smp_flush_tlb_mm (struct mm_struct *mm) } /* - * Run a function on another CPU + * Run a function on a specific CPU * <func> The function to run. This must be fast and non-blocking. * <info> An arbitrary pointer to pass to the function. * <nonatomic> Currently unused. @@ -366,9 +366,11 @@ smp_call_function_single (int cpuid, void (*func) (void *info), void *info, int int me = get_cpu(); /* prevent preemption and reschedule on another processor */ if (cpuid == me) { - printk(KERN_INFO "%s: trying to call self\n", __FUNCTION__); + local_irq_disable(); + func(info); + local_irq_enable(); put_cpu(); - return -EBUSY; + return 0; } data.func = func; diff --git a/arch/ia64/kernel/time.c b/arch/ia64/kernel/time.c index 6c0e9e2e1b82..98cfc90cab1d 100644 --- a/arch/ia64/kernel/time.c +++ b/arch/ia64/kernel/time.c @@ -240,7 +240,21 @@ ia64_init_itm (void) if (!nojitter) itc_jitter_data.itc_jitter = 1; #endif - } + } else + /* + * ITC is drifty and we have not synchronized the ITCs in smpboot.c. + * ITC values may fluctuate significantly between processors. + * Clock should not be used for hrtimers. Mark itc as only + * useful for boot and testing. + * + * Note that jitter compensation is off! There is no point of + * synchronizing ITCs since they may be large differentials + * that change over time. + * + * The only way to fix this would be to repeatedly sync the + * ITCs. Until that time we have to avoid ITC. + */ + clocksource_itc.rating = 50; /* Setup the CPU local timer tick */ ia64_cpu_local_tick(); |