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SubjectRe: [PATCH 02/14] arm64: Call ARCH_WORKAROUND_2 on transitions between EL0 and EL1
On Wed, May 23, 2018 at 10:23:20AM +0100, Julien Grall wrote:
> Hi Marc,
>
> On 05/22/2018 04:06 PM, Marc Zyngier wrote:
> > diff --git a/arch/arm64/kernel/entry.S b/arch/arm64/kernel/entry.S
> > index ec2ee720e33e..f33e6aed3037 100644
> > --- a/arch/arm64/kernel/entry.S
> > +++ b/arch/arm64/kernel/entry.S
> > @@ -18,6 +18,7 @@
> > * along with this program. If not, see <http://www.gnu.org/licenses/>.
> > */
> > +#include <linux/arm-smccc.h>
> > #include <linux/init.h>
> > #include <linux/linkage.h>
> > @@ -137,6 +138,18 @@ alternative_else_nop_endif
> > add \dst, \dst, #(\sym - .entry.tramp.text)
> > .endm
> > + // This macro corrupts x0-x3. It is the caller's duty
> > + // to save/restore them if required.
>
> NIT: Shouldn't you use /* ... */ for multi-line comments?

There's no requirement to do so, and IIRC even Torvalds prefers '//'
comments for multi-line things these days.

Mark.

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