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authorHATAYAMA Daisuke <d.hatayama@jp.fujitsu.com>2013-10-16 13:47:05 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2013-10-16 21:35:53 -0700
commitfad1a86e25e0a1f85635ed06ef62ddadd5b8fa4c (patch)
treed616a4153716c2e33a39b5073d1a5ec00e636008 /mm
parent2cbe3b0af82279f14cfb3195f2406651f28ee9b8 (diff)
downloadlinaro-lsk-fad1a86e25e0a1f85635ed06ef62ddadd5b8fa4c.tar.gz
procfs: call default get_unmapped_area on MMU-present architectures
Commit c4fe24485729 ("sparc: fix PCI device proc file mmap(2)") added proc_reg_get_unmapped_area in proc_reg_file_ops and proc_reg_file_ops_no_compat, by which now mmap always returns EIO if get_unmapped_area method is not defined for the target procfs file, which causes regression of mmap on /proc/vmcore. To address this issue, like get_unmapped_area(), call default current->mm->get_unmapped_area on MMU-present architectures if pde->proc_fops->get_unmapped_area, i.e. the one in actual file operation in the procfs file, is not defined. Reported-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: HATAYAMA Daisuke <d.hatayama@jp.fujitsu.com> Cc: Alexey Dobriyan <adobriyan@gmail.com> Cc: David S. Miller <davem@davemloft.net> Tested-by: Michael Holzheu <holzheu@linux.vnet.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'mm')
0 files changed, 0 insertions, 0 deletions