#define pr_fmt(fmt) "xen:" KBUILD_MODNAME ": " fmt #include #include #include #include #include static void enable_hotplug_cpu(int cpu) { if (!cpu_present(cpu)) xen_arch_register_cpu(cpu); set_cpu_present(cpu, true); } static void disable_hotplug_cpu(int cpu) { if (cpu_online(cpu)) { lock_device_hotplug(); device_offline(get_cpu_device(cpu)); unlock_device_hotplug(); } if (cpu_present(cpu)) xen_arch_unregister_cpu(cpu); set_cpu_present(cpu, false); } static int vcpu_online(unsigned int cpu) { int err; char dir[16], state[16]; sprintf(dir, "cpu/%u", cpu); err = xenbus_scanf(XBT_NIL, dir, "availability", "%15s", state); if (err != 1) { if (!xen_initial_domain()) pr_err("Unable to read cpu state\n"); return err; } if (strcmp(state, "online") == 0) return 1; else if (strcmp(state, "offline") == 0) return 0; pr_err("unknown state(%s) on CPU%d\n", state, cpu); return -EINVAL; } static void vcpu_hotplug(unsigned int cpu) { if (!cpu_possible(cpu)) return; switch (vcpu_online(cpu)) { case 1: enable_hotplug_cpu(cpu); break; case 0: disable_hotplug_cpu(cpu); break; default: break; } } static void handle_vcpu_hotplug_event(struct xenbus_watch *watch, const char **vec, unsigned int len) { unsigned int cpu; char *cpustr; const char *node = vec[XS_WATCH_PATH]; cpustr = strstr(node, "cpu/"); if (cpustr != NULL) { sscanf(cpustr, "cpu/%u", &cpu); vcpu_hotplug(cpu); } } static int setup_cpu_watcher(struct notifier_block *notifier, unsigned long event, void *data) { int cpu; static struct xenbus_watch cpu_watch = { .node = "cpu", .callback = handle_vcpu_hotplug_event}; (void)register_xenbus_watch(&cpu_watch); for_each_possible_cpu(cpu) { if (vcpu_online(cpu) == 0) { (void)cpu_down(cpu); set_cpu_present(cpu, false); } } return NOTIFY_DONE; } static int __init setup_vcpu_hotplug_event(void) { static struct notifier_block xsn_cpu = { .notifier_call = setup_cpu_watcher }; #ifdef CONFIG_X86 if (!xen_pv_domain()) #else if (!xen_domain()) #endif return -ENODEV; register_xenstore_notifier(&xsn_cpu); return 0; } arch_initcall(setup_vcpu_hotplug_event); id' value='2ad5d52d42810bed95100a3d912679d8864421ec'/>
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authorHelge Deller <deller@gmx.de>2017-01-28 11:52:02 +0100
committerHelge Deller <deller@gmx.de>2017-01-28 21:54:23 +0100
commit2ad5d52d42810bed95100a3d912679d8864421ec (patch)
tree7f93e2f906b1c86f5b76c0f4c0978d41a8a29861 /net/mac80211/agg-tx.c
parent83b5d1e3d3013dbf90645a5d07179d018c8243fa (diff)
parisc: Don't use BITS_PER_LONG in userspace-exported swab.h header
In swab.h the "#if BITS_PER_LONG > 32" breaks compiling userspace programs if BITS_PER_LONG is #defined by userspace with the sizeof() compiler builtin. Solve this problem by using __BITS_PER_LONG instead. Since we now #include asm/bitsperlong.h avoid further potential userspace pollution by moving the #define of SHIFT_PER_LONG to bitops.h which is not exported to userspace. This patch unbreaks compiling qemu on hppa/parisc. Signed-off-by: Helge Deller <deller@gmx.de> Cc: <stable@vger.kernel.org>
Diffstat (limited to 'net/mac80211/agg-tx.c')