[PATCH] powerpc/epapr: add "memory" as a clobber to all hypercalls

Kumar Gala galak at kernel.crashing.org
Thu Mar 22 04:21:24 EST 2012

On Mar 15, 2012, at 5:41 PM, Timur Tabi wrote:

> The "memory" clobber tells the compiler to ensure that all writes to memory
> are committed before the hypercall is made.
> "memory" is only necessary for hcalls where the Hypervisor will read or
> write guest memory. However, we add it to all hcalls because the impact is
> minimal, and we want to ensure that it's present for the hcalls that need it.
> Signed-off-by: Timur Tabi <timur at freescale.com>
> ---
> arch/powerpc/include/asm/epapr_hcalls.h |    7 ++++++-
> 1 files changed, 6 insertions(+), 1 deletions(-)


- k

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