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authorEric Dumazet <edumazet@google.com>2017-09-08 16:15:54 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2017-09-08 18:26:49 -0700
commitbc9ae2247ac92fd4d962507bafa3afffff6660ff (patch)
tree56c87a7b15fc0beb1f51e57167840e1d0fd3c917 /usr
parent7c61bd6983b185272315722787cceacf5f5d2e7d (diff)
downloadlinux-bc9ae2247ac92fd4d962507bafa3afffff6660ff.tar.bz2
radix-tree: must check __radix_tree_preload() return value
__radix_tree_preload() only disables preemption if no error is returned. So we really need to make sure callers always check the return value. idr_preload() contract is to always disable preemption, so we need to add a missing preempt_disable() if an error happened. Similarly, ida_pre_get() only needs to call preempt_enable() in the case no error happened. Link: http://lkml.kernel.org/r/1504637190.15310.62.camel@edumazet-glaptop3.roam.corp.google.com Fixes: 0a835c4f090a ("Reimplement IDR and IDA using the radix tree") Fixes: 7ad3d4d85c7a ("ida: Move ida_bitmap to a percpu variable") Signed-off-by: Eric Dumazet <edumazet@google.com> Cc: Matthew Wilcox <mawilcox@microsoft.com> Cc: "Kirill A. Shutemov" <kirill.shutemov@linux.intel.com> Cc: <stable@vger.kernel.org> [4.11+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'usr')
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