Re: [PATCH v3 5/6] powerpc/pseries: implement paravirt qspinlocks for SPLPAR
From: Segher Boessenkool <hidden>
Date: 2020-07-23 20:31:06
Also in:
linux-arch, lkml, virtualization
On Thu, Jul 23, 2020 at 09:58:55PM +0200, peterz@infradead.org wrote:
asm ("addb %[val], %b[var];"
"cmovc %[sat], %[var];"
: [var] "+r" (tmp)
: [val] "ir" (val), [sat] "r" (sat)
);
"var" (operand 0) needs an earlyclobber ("sat" is read after "var" is
written for the first time).
Segher