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| author | HATAYAMA Daisuke <[email protected]> | 2013-10-16 20:47:05 +0000 |
|---|---|---|
| committer | Linus Torvalds <[email protected]> | 2013-10-17 04:35:53 +0000 |
| commit | fad1a86e25e0a1f85635ed06ef62ddadd5b8fa4c (patch) | |
| tree | d616a4153716c2e33a39b5073d1a5ec00e636008 /lib/spinlock_debug.c | |
| parent | procfs: fix unintended truncation of returned mapped address (diff) | |
| download | kernel-fad1a86e25e0a1f85635ed06ef62ddadd5b8fa4c.tar.gz kernel-fad1a86e25e0a1f85635ed06ef62ddadd5b8fa4c.zip | |
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 <[email protected]>
Signed-off-by: HATAYAMA Daisuke <[email protected]>
Cc: Alexey Dobriyan <[email protected]>
Cc: David S. Miller <[email protected]>
Tested-by: Michael Holzheu <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>
Diffstat (limited to 'lib/spinlock_debug.c')
0 files changed, 0 insertions, 0 deletions