xarray: make xa_alloc_cyclic() return 0 on all success cases

Change xa_alloc_cyclic() to return 0 even on wrap-around.  Do the same for
xa_alloc_cyclic_irq() and xa_alloc_cyclic_bh().

This will prevent any future bug of treating return of 1 as an error:
	int ret = xa_alloc_cyclic(...)
	if (ret) // currently mishandles ret==1
		goto failure;

If there will be someone interested in when wrap-around occurs, there is
still __xa_alloc_cyclic() that behaves as before.  For now there is no
such user.

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Przemek Kitszel <[email protected]>
Suggested-by: Matthew Wilcox <[email protected]>
Link: https://lore.kernel.org/netdev/[email protected]
Cc: Andriy Shevchenko <[email protected]>
Cc: Dave Hansen <[email protected]>
Cc: Michal Swiatkowski <[email protected]>
Cc: Przemek Kitszel <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

0 files changed, 0 insertions, 0 deletions