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path: root/tools/build/feature/test-libunwind-arm.c
blob: 632d95ec641f2130d926f758b77a2c86f8c6c301 (plain)
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#include <libunwind-arm.h>
#include <stdlib.h>

extern int UNW_OBJ(dwarf_search_unwind_table) (unw_addr_space_t as,
					       unw_word_t ip,
					       unw_dyn_info_t *di,
					       unw_proc_info_t *pi,
					       int need_unwind_info, void *arg);


#define dwarf_search_unwind_table UNW_OBJ(dwarf_search_unwind_table)

static unw_accessors_t accessors;

int main(void)
{
	unw_addr_space_t addr_space;

	addr_space = unw_create_addr_space(&accessors, 0);
	if (addr_space)
		return 0;

	unw_init_remote(NULL, addr_space, NULL);
	dwarf_search_unwind_table(addr_space, 0, NULL, NULL, 0, NULL);

	return 0;
}
283c2eb5bc14fa2619c5'>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 'tools/virtio')