Messages in this thread | | | Date | Sun, 6 May 2007 22:44:29 +0200 | From | Sam Ravnborg <> | Subject | Re: 2.6.21-mm1 |
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On Sun, May 06, 2007 at 08:33:48AM +0400, Dan Kruchinin wrote: > > > ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.21/2.6.21-mm1/ > > I have the following message after kernel compilation: > > --- > ... > WARNING: init/built-in.o - Section mismatch: reference to .init.text: > from .text between 'rest_init' (at offset 0x11e) and 'try_name'
Covered in another mail.
> ... > ... > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x20) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x24) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x28) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x2c) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x30) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x34) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x38) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x3c) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x40) > WARNING: drivers/dma/async_tx.o - Section mismatch: reference to > .init.data: from .data after 'channel_table' (at offset 0x44)
We have following code: /* guarantee that calls that happen before init will not find a channel */ static struct chan_ref_percpu __initdata null_chan_ref[NR_CPUS];
static struct chan_ref_percpu *channel_table[] = { DMA_TX_ARRAY_INIT(null_chan_ref) };
The DMA_TX_ARRAY_INIT is some macro obscufation that serves no real use and just hide a few assignements. What happens here is that we assign channel_table a value that are used as cover-up until the real assignment happens in the init function. So the only real way to fix this seems to remove the otherwise correct __initdata mark on null_chan_ref. Thats one pointer wasted pr. cpu (in total NR_CPUS).
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