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SubjectRe: crypto/async_tx/* doesn't build on s390
On Fri, Feb 01, 2008 at 02:31:28PM -0700, Dan Williams wrote:
> On Feb 1, 2008 4:37 AM, Cornelia Huck <cornelia.huck@de.ibm.com> wrote:
> > On Thu, 31 Jan 2008 12:49:00 -0700,
> > "Williams, Dan J" <dan.j.williams@intel.com> wrote:
> >
> > > I am mistaken, the 'depends on ARCH...' precludes HAS_DMA. Perhaps the compiler is emitting a call to async_tx_find_channel when it needs to be inline? On x86 do_async_xor is successfully compiled away when CONFIG_DMA_ENGINE=n.
> >
> > Just checked why it compiled for me on one box but not on the other and
> > found that deactivating CONFIG_SECTION_MISMATCH makes it go away. Hmm...
> >
>
> Here is what I have come up with as a fix.

The fix works for me. Thanks! However your mailer replaced tabs with spaces
and added an extra line break.

> ---
> async_tx: prevent do_async_xor from compiling on !HAS_DMA archs
>
> With the addition of -fno-inline in CONFIG_DEBUG_SECTION_MISMATCH
> do_async_xor is no longer compiled away on !HAS_DMA archs like s390.
> Other async_tx calls to the dma-api are already open coded inline.
>
> Signed-off-by: Dan Williams <dan.j.williams@intel.com>
> ---
>
> crypto/async_tx/async_xor.c | 8 ++++++++
> 1 files changed, 8 insertions(+), 0 deletions(-)
>
>
> diff --git a/crypto/async_tx/async_xor.c b/crypto/async_tx/async_xor.c
> index 2575f67..393f07d 100644
> --- a/crypto/async_tx/async_xor.c
> +++ b/crypto/async_tx/async_xor.c
> @@ -41,6 +41,14 @@ do_async_xor(struct dma_async_tx_descriptor *tx,
> struct dma_device *device,
> enum dma_data_direction dir;
> int i;
>
> + /* if this function is not inlined we need to prevent
> + * the rest of the routine from compiling on !HAS_DMA
> + * archs
> + */
> + #ifndef CONFIG_DMA_ENGINE
> + return;
> + #endif
> +
> pr_debug("%s: len: %zu\n", __FUNCTION__, len);
>
> dir = (flags & ASYNC_TX_ASSUME_COHERENT) ?


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