x86: Fix UV BAU activation descriptor init

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The UV tlb shootdown code has a serious initialization error.

An array of structures [32*8] is initialized as if it were [32].
The array is indexed by (cpu number on the blade)*8, so the short
initialization works for up to 4 cpus on a blade.
But above that, we provide an invalid opcode to the hub's
broadcast assist unit.

This patch changes the allocation of the array to use its symbolic
dimensions for better clarity. And initializes all 32*8 entries.

Shortened 'UV_ACTIVATION_DESCRIPTOR_SIZE' to 'UV_ADP_SIZE' per Ingo's
recommendation.

Tested on the UV simulator.

Signed-off-by: Cliff Wickman <cpw@sgi.com>
Cc: <stable@kernel.org>
LKML-Reference: <E1M6lZR-0007kV-Aq@eag09.americas.sgi.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

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This commit is contained in:

Cliff Wickman 2009-05-20 08:10:57 -05:00 • committed by Ingo Molnar

parent d9244b5d2f

commit 0e2595cdfd

2 changed files with 14 additions and 3 deletions

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2

arch/x86/include/asm/uv/uv_bau.h

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15

arch/x86/kernel/tlb_uv.c

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