linux

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Michael Ellerman cb30711374 perf_event: Don't allow vmalloc() backed perf on powerpc

On powerpc the perf event interrupt is not masked when interrupts are
disabled, allowing it to function as an NMI.

This causes problems if perf is using vmalloc. If we take a page fault
on the vmalloc region the fault handler will fail the page fault because
it detects we are coming in from an NMI (see do_hash_page()).

We don't actually need or want vmalloc backed perf so just disable it on
powerpc.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: <linuxppc-dev@ozlabs.org>
Cc: Andrew Morton <akpm@osdl.org>
Cc: Anton Blanchard <anton@samba.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: acme@ghostprotocols.net
Cc: sukadev@linux.vnet.ibm.com
Link: http://lkml.kernel.org/r/1430720799-18426-1-git-send-email-mpe@ellerman.id.au
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2015-05-08 12:26:01 +02:00

calibrate.c

kernel: add calibration_delay_done()

2014-06-16 12:47:39 -06:00

do_mounts_initrd.c

usermodehelper: split remaining calls to call_usermodehelper_fns()

2013-04-30 17:04:06 -07:00

do_mounts_md.c

init: disable sparse checking of the mount.o source files

2012-05-31 17:49:27 -07:00

do_mounts_rd.c

initramfs: support initramfs that is bigger than 2GiB