linux

iv/linux

History

Michael Ellerman 1507589787 powerpc/xmon: Fix timeout loop in get_output_lock()

As far as I can tell, our 70s era timeout loop in get_output_lock() is
generating no code.

This leads to the hostile takeover happening more or less simultaneously
on all cpus. The result is "interesting", some example output that is
more readable than most:

    cpu 0x1: Vector: 100 (Scypsut e0mx bR:e setV)e catto xc0p:u[ c 00
    c0:0  000t0o0V0erc0td:o5 rfc28050000]0c00 0 0  0 6t(pSrycsV1ppuot
    uxe 1m 2 0Rx21e3:0s0ce000c00000t00)00 60602oV2SerucSayt0y 0p 1sxs

Fix it by using udelay() in the timeout loop. The wait time and check
frequency are arbitrary, but seem to work OK. We already rely on
udelay() working so this is not a new dependency.

Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>

2014-02-11 11:24:51 +11:00

boot

Merge remote-tracking branch 'agust/next' into next

2014-01-29 16:53:55 +11:00

configs

Merge remote-tracking branch 'scott/next' into next

2014-01-15 14:22:35 +11:00

crypto

powerpc: Fix compile of sha1-powerpc-asm.S on 32-bit

2013-03-05 16:56:26 +11:00

include

powerpc: Fix kdump hang issue on p8 with relocation on exception enabled.