for review: sys/dev/md/md.c patch

[Oliver Fromme]

Luigi Rizzo <rizzo at icir.org> wrote:
 > just discovered, trying to resurrect picobsd on -current,
 > that the compiler in 6.x/7.x has become smart and, at least
 > with the default compilation flags, will optimize out
 > the "end_mfs_root" string from the object.

Shouldn't it be sufficient to declare the string as volatile?
That should prevent it from being optimized by the compiler.

(I'm not questioning your solution, mind you.  I just wonder
if "volatile" would do the job.  So far I've used volatile
for things like sig_atomic_t only.)

Best regards
   Oliver

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Oliver Fromme,  secnetix GmbH & Co. KG, Marktplatz 29, 85567 Grafing
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