staging: lustre: simplify linux-prim.c

/*

 * Defined by platform

 */

sigset_t cfs_block_allsigs(void);

sigset_t cfs_block_sigs(unsigned long sigs);

sigset_t cfs_block_sigsinv(unsigned long sigs);

void cfs_restore_sigs(sigset_t sigset);

void cfs_clear_sigpending(void);

struct libcfs_ioctl_handler {

	struct list_head item;

#include <linux/kgdb.h>

#endif

sigset_t

cfs_block_allsigs(void)

{

	unsigned long flags;

	sigset_t old;

	spin_lock_irqsave(&current->sighand->siglock, flags);

	old = current->blocked;

	sigfillset(&current->blocked);

	recalc_sigpending();

	spin_unlock_irqrestore(&current->sighand->siglock, flags);

	return old;

}

EXPORT_SYMBOL(cfs_block_allsigs);

sigset_t cfs_block_sigs(unsigned long sigs)

{

	unsigned long flags;

	sigset_t old;

	spin_lock_irqsave(&current->sighand->siglock, flags);

	old = current->blocked;

	sigaddsetmask(&current->blocked, sigs);

	recalc_sigpending();

	spin_unlock_irqrestore(&current->sighand->siglock, flags);

	return old;

}

EXPORT_SYMBOL(cfs_block_sigs);

/* Block all signals except for the @sigs */

sigset_t cfs_block_sigsinv(unsigned long sigs)

{

	spin_unlock_irqrestore(&current->sighand->siglock, flags);

}

EXPORT_SYMBOL(cfs_restore_sigs);

void

cfs_clear_sigpending(void)

{

	unsigned long flags;

	spin_lock_irqsave(&current->sighand->siglock, flags);

	clear_tsk_thread_flag(current, TIF_SIGPENDING);

	spin_unlock_irqrestore(&current->sighand->siglock, flags);

}

EXPORT_SYMBOL(cfs_clear_sigpending);