parisc: fix out-of-register compiler error in ldcw inline assembler function

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commit 45db07382a upstream.

The __ldcw macro has a problem when its argument needs to be reloaded from
memory. The output memory operand and the input register operand both need to
be reloaded using a register in class R1_REGS when generating 64-bit code.
This fails because there's only a single register in the class. Instead, use a
memory clobber. This also makes the __ldcw macro a compiler memory barrier.

Signed-off-by: John David Anglin <dave.anglin@bell.net>
Signed-off-by: Helge Deller <deller@gmx.de>
Signed-off-by: Luis Henriques <luis.henriques@canonical.com>

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John David Anglin 2014-12-14 10:49:11 -05:00 • committed by Luis Henriques

parent e147a5d32f

commit 047a3b12ee

1 changed files with 10 additions and 3 deletions

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arch/parisc/include/asm/ldcw.h

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