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idr: Fix idr_alloc_u32 on 32-bit systems
authorMatthew Wilcox (Oracle) <willy@infradead.org>
Sat, 2 Nov 2019 04:25:08 +0000 (00:25 -0400)
committerMatthew Wilcox (Oracle) <willy@infradead.org>
Sun, 3 Nov 2019 11:36:50 +0000 (06:36 -0500)
commitb7e9728f3d7fc5c5c8508d99f1675212af5cfd49
tree15be71399abd81c6661f5cac4c79b79ec3fdf07etree | snapshot
parentf6341c5af4e6e15041be39976d16deca789555facommit | diff
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>
lib/radix-tree.c diff | blob | blame | history
Linux 6.x block layer and io_uring tree(s)