On Fri, 11 Jan 2013 17:43:06 -0800 Randy Dunlap [off-list ref] wrote:

b0rked.

Some (randconfig?) causes this set of errors:

  CC      arch/x86/kernel/asm-offsets.s
In file included from include/linux/ktime.h:25:0,
                 from include/linux/timer.h:5,
                 from include/linux/workqueue.h:8,
                 from include/linux/srcu.h:34,
                 from include/linux/notifier.h:15,
                 from include/linux/memory_hotplug.h:6,
                 from include/linux/mmzone.h:761,
                 from include/linux/gfp.h:4,
                 from include/linux/slab.h:12,
                 from include/linux/crypto.h:24,
                 from arch/x86/kernel/asm-offsets.c:8:
include/linux/jiffies.h: In function '__inline_jiffies_to_msecs':
include/linux/jiffies.h:306:10: error: 'HZ_TO_MSEC_MUL32' undeclared (first use in this function)
include/linux/jiffies.h:306:10: note: each undeclared identifier is reported only once for each function it appears in
include/linux/jiffies.h:306:35: error: 'HZ_TO_MSEC_SHR32' undeclared (first use in this function)
include/linux/jiffies.h: In function '__inline_jiffies_to_usecs':
include/linux/jiffies.h:328:10: error: 'HZ_TO_USEC_MUL32' undeclared (first use in this function)
include/linux/jiffies.h:328:35: error: 'HZ_TO_USEC_SHR32' undeclared (first use in this function)
include/linux/jiffies.h: In function '__inline_msecs_to_jiffies':
include/linux/jiffies.h:392:10: error: 'MSEC_TO_HZ_MUL32' undeclared (first use in this function)
include/linux/jiffies.h:392:33: error: 'MSEC_TO_HZ_ADJ32' undeclared (first use in this function)
include/linux/jiffies.h:393:6: error: 'MSEC_TO_HZ_SHR32' undeclared (first use in this function)
include/linux/jiffies.h: In function '__inline_usecs_to_jiffies':
include/linux/jiffies.h:413:10: error: 'USEC_TO_HZ_MUL32' undeclared (first use in this function)
include/linux/jiffies.h:413:33: error: 'USEC_TO_HZ_ADJ32' undeclared (first use in this function)
include/linux/jiffies.h:414:6: error: 'USEC_TO_HZ_SHR32' undeclared (first use in this function)

So, what am I missing? ... how could that have worked - those constants are
generated into kernel/timeconst.h which is only included in kernel/time.c
(from where all this code was moved to jiffies.h).

-- 
Cheers,
Stephen Rothwell                    sfr@canb.auug.org.au