idr: Fix idr_alloc_u32 on 32-bit systems
Attempting to allocate an entry at 0xffffffff when one is already
present would succeed in allocating one at 2^32, which would confuse
everything. Return -ENOSPC in this case, as expected.
Signed-off-by:
Matthew Wilcox (Oracle) <willy@infradead.org>
parent
f6341c5a
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