Messages in this thread | | | Date | Wed, 4 Feb 2009 08:24:58 -0800 (PST) | From | Linus Torvalds <> | Subject | Re: 2.6.29-rc3-git6: Reported regressions from 2.6.28 |
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On Wed, 4 Feb 2009, Rafael J. Wysocki wrote: > > Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12599 > Subject : dri /dev node disappeared with 2.6.29-rc1 > Submitter : Norbert Preining <preining@logic.at> > Date : 2009-01-15 13:42 (21 days old) > References : http://marc.info/?l=linux-kernel&m=123202701026647&w=4
I think this one is simply that Intel DRI now requires CONFIG_FB.
So make sure that you say yes to the CONFIG_FB question (easiest fix: just edit the .config file and change the line "# CONFIG_FB is not set" to "CONFIG_FB=y" and do "make oldconfig" - I realize that people think that graphical config front-ends are simpler, but often just editing the file is the quickest way).
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12591 > Subject : NULL pointer dereference in blk_queue_io_stat > Submitter : Petr Vandrovec <vandrove@vc.cvut.cz> > Date : 2009-01-31 23:58 (5 days old) > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=bc58ba9468d94d62c56ab9b47173583ec140b165 > Handled-By : Jens Axboe <jens.axboe@oracle.com>
I think this one is fixed by commit fb8ec18c316d8.
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12511 > Subject : WARNING: at drivers/dma/dmaengine.c:352 > Submitter : Ingo Molnar <mingo@elte.hu> > Date : 2009-01-19 21:31 (17 days old) > References : http://marc.info/?l=linux-kernel&m=123240070614443&w=4 > Handled-By : Dan Williams <dan.j.williams@intel.com>
This warning just got removed as bogus.
Commit 83436a0560e9ef8af2f0796264dde4bed1415359
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12506 > Subject : Undefined symbols when CONFIG_MFD_PCF50633 is enabled > Submitter : Ozan Çağlayan <ozan@pardus.org.tr> > Date : 2009-01-17 10:56 (19 days old) > References : http://marc.info/?l=linux-kernel&m=123218991104592&w=4
Commit 9e6f8ed7c3a303d37eb119847dd3029701e37e28
> Bug-Entry : http://bugzilla.kernel.org/show_bug.cgi?id=12505 > Subject : 2.6.29-rc1 Firefox crashing on page load > Submitter : Justin Madru <jdm64@gawab.com> > Date : 2009-01-16 20:56 (20 days old) > First-Bad-Commit: http://git.kernel.org/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=4217458dafaa57d8e26a46f5d05ab8c53cf64191 > References : http://marc.info/?l=linux-kernel&m=123213941914274&w=4 > Handled-By : Justin P. Mattock <justinmattock@gmail.com>
Heh. That commit you point to is very innocuous.
Commit 4217458dafaa57d8e26a46f5d05ab8c53cf64191 is a pure cleanup, and it _does_ make the code look nicer, but while it looks lik a total no-op, it actually has a very subtle behavioural change: it makes gcc think that it owns the whole argument stack. Which is _not_ true of 'asmlinkage' functions, but we've never been able to tell gcc to keep its grubby hands off our stack.
So I suspect that gcc inlines the function and then creates a function call that re-uses the "struct pt_regs" on the stack as the argument area too. Which corrupts the "pt_regs", and then we return to user space with some random register contents.
So I think we need to just revert it. Ingo, Hiroshi?
Linus -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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