Re: Build errors due to 64 bit xchg/cmpxchg operations in fs/nfs/flexfilelayout

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On 06/26/2015 09:15 PM, Trond Myklebust wrote:

On Jun 27, 2015 12:09 AM, "Guenter Roeck" <linux@xxxxxxxxxxxx <mailto:linux@xxxxxxxxxxxx>> wrote:
 >
 > Hi,
 >
 > commits 'pNFS/flexfiles: add layoutstats tracking' and 'pnfs/flexfiles: report layoutstat
 > regularly' in -next introduce 64 bit xchg and cmpxchg operations. This causes compile
 > errors with 32 bit builds on architectures which do not support those operations.
 >
 > arm:shmobile_defconfig:
 >
 > fs/built-in.o: In function `nfs4_ff_end_busy_timer':
 > :(.text+0xa7110): undefined reference to `__bad_xchg'
 > fs/built-in.o: In function `nfs4_ff_layoutstat_start_io':
 > :(.text+0xa7304): undefined reference to `__bad_cmpxchg'
 > :(.text+0xa731c): undefined reference to `__bad_cmpxchg'
 > :(.text+0xa73d8): undefined reference to `__bad_cmpxchg'
 >
 > xtensa:allmodconfig:
 >
 > ERROR: "__xchg_called_with_bad_pointer" [fs/nfs/flexfilelayout/nfs_layout_flexfiles.ko] undefined!
 > ERROR: "__cmpxchg_called_with_bad_pointer" [fs/nfs/flexfilelayout/nfs_layout_flexfiles.ko] undefined!
 >
 > Guenter

Hi Guenter

Is this still the case with today's update? The latest patch from Tao was intended to remove those calls.


Hi Trond,

This is with next-20150626. I'll let you know if it still happens with the next build.

Guenter


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