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path: root/include/xen/arm/hypervisor.h
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#ifndef _ASM_ARM_XEN_HYPERVISOR_H
#define _ASM_ARM_XEN_HYPERVISOR_H

#include <linux/init.h>

extern struct shared_info *HYPERVISOR_shared_info;
extern struct start_info *xen_start_info;

/* Lazy mode for batching updates / context switch */
enum paravirt_lazy_mode {
	PARAVIRT_LAZY_NONE,
	PARAVIRT_LAZY_MMU,
	PARAVIRT_LAZY_CPU,
};

static inline enum paravirt_lazy_mode paravirt_get_lazy_mode(void)
{
	return PARAVIRT_LAZY_NONE;
}

extern struct dma_map_ops *xen_dma_ops;

#ifdef CONFIG_XEN
void __init xen_early_init(void);
#else
static inline void xen_early_init(void) { return; }
#endif

#ifdef CONFIG_HOTPLUG_CPU
static inline void xen_arch_register_cpu(int num)
{
}

static inline void xen_arch_unregister_cpu(int num)
{
}
#endif

#endif /* _ASM_ARM_XEN_HYPERVISOR_H */
75422726b0f717d67db3283c2eb5bc14fa2619c5'>75422726b0f717d67db3283c2eb5bc14fa2619c5 (diff)
pid: fix lockdep deadlock warning due to ucount_lock
========================================================= [ INFO: possible irq lock inversion dependency detected ] 4.10.0-rc2-00024-g4aecec9-dirty #118 Tainted: G W --------------------------------------------------------- swapper/1/0 just changed the state of lock: (&(&sighand->siglock)->rlock){-.....}, at: [<ffffffffbd0a1bc6>] __lock_task_sighand+0xb6/0x2c0 but this lock took another, HARDIRQ-unsafe lock in the past: (ucounts_lock){+.+...} and interrupts could create inverse lock ordering between them. other info that might help us debug this: Chain exists of: &(&sighand->siglock)->rlock --> &(&tty->ctrl_lock)->rlock --> ucounts_lock Possible interrupt unsafe locking scenario: CPU0 CPU1 ---- ---- lock(ucounts_lock); local_irq_disable(); lock(&(&sighand->siglock)->rlock); lock(&(&tty->ctrl_lock)->rlock); <Interrupt> lock(&(&sighand->siglock)->rlock); *** DEADLOCK *** This patch removes a dependency between rlock and ucount_lock. Fixes: f333c700c610 ("pidns: Add a limit on the number of pid namespaces") Cc: stable@vger.kernel.org Signed-off-by: Andrei Vagin <avagin@openvz.org> Acked-by: Al Viro <viro@ZenIV.linux.org.uk> Signed-off-by: Eric W. Biederman <ebiederm@xmission.com>
Diffstat (limited to 'include/crypto')