Re: 2.6.19-rc5-mm1 fails to compile with gcc 4.2

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drivers/kvm/kvm_main.c: In function 'kvm_dev_ioctl_run':
drivers/kvm/kvm_main.c:153: error: 'asm' operand has impossible
constraints drivers/kvm/kvm_main.c:158: error: 'asm' operand has
impossible constraints

Smells like a gcc regression.  Can you send .config?

Or better yet, preprocessed source and full gcc command line (as seen on
'make V=1').

Just the function containing those lines (please mark which
lines they are) would do probably.

It does look like a gcc bug -- -O0 makes it go away.
Details at http://gcc.gnu.org/bugzilla/show_bug.cgi?id=29808

PR29808 is not a GCC bug, but invalid code.


Segher

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