Re: [PATCH v4 2/3] thp: add HPAGE_PMD_* definitions for !CONFIG_TRANSPARENT_HUGEPAGE

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On 03/21/2012 03:36 PM, Paul Gortmaker wrote:
On 12-03-21 06:19 PM, Andrew Morton wrote:
On Wed, 21 Mar 2012 18:07:41 -0400
Paul Gortmaker<paul.gortmaker@xxxxxxxxxxxxx>  wrote:

On Mon, Mar 12, 2012 at 6:30 PM, Naoya Horiguchi
<n-horiguchi@xxxxxxxxxxxxx>  wrote:
These macros will be used in later patch, where all usage are expected
to be optimized away without #ifdef CONFIG_TRANSPARENT_HUGEPAGE.
But to detect unexpected usages, we convert existing BUG() to BUILD_BUG().

Just a heads up that this showed up in linux-next today as the
cause of a new build failure for an ARM board:

Dammit.

http://kisskb.ellerman.id.au/kisskb/buildresult/5930053/

Site is dead.  What was failure, please?

Odd, I just reloaded the above link and it seems alive?
Anyway here is where it goes off the rails.

mm/pgtable-generic.c: In function 'pmdp_clear_flush_young':
mm/pgtable-generic.c:76:136: error: call to '__build_bug_failed' declared with attribute error: BUILD_BUG failed
make[2]: *** [mm/pgtable-generic.o] Error 1


This is just another instance of:

https://lkml.org/lkml/2011/12/16/507

There was some discussion in that thread of how it might be fixed.

David Daney


Build was for ARM, tct_hammer_defconfig

Paul.
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