Re: [patch 03/36] Fix Intel IOMMU write-buffer flushing

[Thomas Backlund]

Thomas Backlund skrev:
> This patch is broken compared to what's in:
> http://git.kernel.org/git/?p=linux/kernel/git/torvalds/linux-2.6.git;a=commit;h=ca77fde8e62cecb2c0769052228d15b901367af8 
>
>
> attached patch fixes it

As no-one responded yet...

I forgot to tell how to reproduce it:

on x86_64:

make defconfig
make

and you will end up with:
[thomas@tmb linux-2.6.27.19-rc1]$ LC_ALL=C make
  CHK     include/linux/version.h
  CHK     include/linux/utsrelease.h
  CALL    scripts/checksyscalls.sh
  CHK     include/linux/compile.h
  CC      drivers/pci/intel-iommu.o
drivers/pci/intel-iommu.c: In function 'iommu_flush_write_buffer':
drivers/pci/intel-iommu.c:530: error: 'rwbf_quirk' undeclared (first use 
in this function)
drivers/pci/intel-iommu.c:530: error: (Each undeclared identifier is 
reported only once
drivers/pci/intel-iommu.c:530: error: for each function it appears in.)
make[2]: *** [drivers/pci/intel-iommu.o] Error 1
make[1]: *** [drivers/pci] Error 2
make: *** [drivers] Error 2
[thomas@tmb linux-2.6.27.19-rc1]$

This happends because 'rwbf_quirk' is declared after it's first use.

The upstream git has 'rwbf_quirk' declared before any use of it.

That's what my patch fixes, by simply moving

static int rwbf_quirk = 0;

to the beginning of the file...

Hopefully this helps.
--
Thomas


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