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| author | Richard Weinberger <richard@nod.at> | 2013-08-17 18:46:00 +0200 |
|---|---|---|
| committer | Richard Weinberger <richard@nod.at> | 2013-09-07 10:38:34 +0200 |
| commit | f75b1b1bedfb498cc43a992ce4d7ed8df3b1e770 (patch) | |
| tree | e7afc9647b9cc80fb95ee9dae7d9532b67efdc01 /scripts/pnmtologo.c | |
| parent | 65984ff9d2179a97e5a11aaef1e86fdb276cfad5 (diff) | |
| download | op-kernel-dev-f75b1b1bedfb498cc43a992ce4d7ed8df3b1e770.zip op-kernel-dev-f75b1b1bedfb498cc43a992ce4d7ed8df3b1e770.tar.gz | |
um: Implement probe_kernel_read()
UML needs it's own probe_kernel_read() to handle kernel
mode faults correctly.
The implementation uses mincore() on the host side to detect
whether a page is owned by the UML kernel process.
This fixes also a possible crash when sysrq-t is used.
Starting with 3.10 sysrq-t calls probe_kernel_read() to
read details from the kernel workers. As kernel worker are
completely async pointers may turn NULL while reading them.
Cc: <stian@nixia.no>
Cc: <tj@kernel.org>
Cc: <stable@vger.kernel.org> # 3.10.x
Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'scripts/pnmtologo.c')
0 files changed, 0 insertions, 0 deletions
