From: Jiri Slaby <jirislaby@gmail.com>
To: Len Brown <lenb@kernel.org>
Cc: linux-acpi@vger.kernel.org, rjw@sisk.pl,
Linux kernel mailing list <linux-kernel@vger.kernel.org>,
torvalds@linux-foundation.org
Subject: 2.6.29 acpi regression: acpi_ex_extract_from_field -- div by zero
Date: Sun, 15 Mar 2009 11:47:06 +0100 [thread overview]
Message-ID: <49BCDCAA.8040309@gmail.com> (raw)
Hi,
sometimes, when booting up/resuming from disk, I get an oops[1].
obj_desc->common_field.access_bit_width is zero, but even after the
loop. Division before the loop is apparently OK.
This is the case:
/* Mask off any extra bits in the last datum */
buffer_tail_bits = obj_desc->common_field.bit_length %
obj_desc->common_field.access_bit_width;
.L39:
xorl %edx, %edx #
movzbl 37(%rbx), %esi #
<variable>.common_field.access_bit_width,
<variable>.common_field.access_bit_width
movl 24(%rbx), %eax # <variable>.common_field.bit_length,
<variable>.common_field.bit_length
--------------- here:
divl %esi # <variable>.common_field.access_bit_width
movl %edx, %ecx #, tmp121
testl %edx, %edx # tmp121
je .L41 #,
[1] http://www.fi.muni.cz/~xslaby/sklad/panics/acpi_oops.png
next reply other threads:[~2009-03-15 10:47 UTC|newest]
Thread overview: 10+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-03-15 10:47 Jiri Slaby [this message]
2009-03-15 17:49 ` 2.6.29 acpi regression: acpi_ex_extract_from_field -- div by zero Linus Torvalds
2009-03-15 19:08 ` Moore, Robert
2009-03-15 19:32 ` Jiri Slaby
[not found] ` <d3f22a0903152046m891dc0aq6ca01eed32a9eb32@mail.gmail.com>
2009-03-16 3:42 ` Lin Ming
2009-03-16 16:31 ` Jiri Slaby
2009-03-18 8:08 ` Jiri Slaby
2009-03-19 16:06 ` Jiri Slaby
2009-03-20 0:48 ` Lin Ming
2009-03-20 4:53 ` Lin Ming
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