[Bug 207173] kvm compiling problem 5.6.x kvm_main.c:2236:42: error: ‘nr_pages_avail’ may be used uninitialized in this function

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https://bugzilla.kernel.org/show_bug.cgi?id=207173

--- Comment #11 from Mike Auty (mike.auty@gmail.com) ---
I'm also experiencing this, but not on clang, on gcc-10.1.0.  The initially
proposed resolution:

gfn_t nr_pages_avail = 0; 

succeeded.  The alternative resolution:

gfn uninitialized_var(nr_pages_avail);

Needed to be changed to 

gfn_t uninitialized_var(nr_pages_avail);

but also allowed compilation.

The suggestion to mark __gfn_to_hva_many and gfn_to_hva_many as always inline
failed to resolve the problem though.

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