Re: [RFC 5/8] x86: refcount: prevent gcc distortions

>>> On 16.05.18 at 18:44, wrote: > Jan Beulich wrote: > On 15.05.18 at 16:11, wrote: >>> --- a/arch/x86/include/asm/refcount.h >>> +++ b/arch/x86/include/asm/refcount.h >>> @@ -14,34 +14,43 @@ >>> * central refcount exception. The

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

>>> On 16.05.18 at 18:44, wrote: > Jan Beulich wrote: > On 15.05.18 at 16:11, wrote: >>> --- a/arch/x86/include/asm/refcount.h >>> +++ b/arch/x86/include/asm/refcount.h >>> @@ -14,34 +14,43 @@ >>> * central refcount exception. The fixup address for the exception points >>> * back to the

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

Jan Beulich wrote: On 15.05.18 at 16:11, wrote: >> --- a/arch/x86/include/asm/refcount.h >> +++ b/arch/x86/include/asm/refcount.h >> @@ -14,34 +14,43 @@ >> * central refcount exception. The fixup address for the exception points >> * back to the

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

Jan Beulich wrote: On 15.05.18 at 16:11, wrote: >> --- a/arch/x86/include/asm/refcount.h >> +++ b/arch/x86/include/asm/refcount.h >> @@ -14,34 +14,43 @@ >> * central refcount exception. The fixup address for the exception points >> * back to the regular execution flow in .text. >> */ >>

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

Kees Cook wrote: > On Tue, May 15, 2018 at 7:11 AM, Nadav Amit wrote: >> GCC considers the number of statements in inlined assembly blocks, >> according to new-lines and semicolons, as an indication to the cost of >> the block in time and space. This

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

Kees Cook wrote: > On Tue, May 15, 2018 at 7:11 AM, Nadav Amit wrote: >> GCC considers the number of statements in inlined assembly blocks, >> according to new-lines and semicolons, as an indication to the cost of >> the block in time and space. This data is distorted by the kernel code, >>

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

On Tue, May 15, 2018 at 7:11 AM, Nadav Amit wrote: > GCC considers the number of statements in inlined assembly blocks, > according to new-lines and semicolons, as an indication to the cost of > the block in time and space. This data is distorted by the kernel code, > which puts

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

On Tue, May 15, 2018 at 7:11 AM, Nadav Amit wrote: > GCC considers the number of statements in inlined assembly blocks, > according to new-lines and semicolons, as an indication to the cost of > the block in time and space. This data is distorted by the kernel code, > which puts information in

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

>>> On 15.05.18 at 16:11, wrote: > --- a/arch/x86/include/asm/refcount.h > +++ b/arch/x86/include/asm/refcount.h > @@ -14,34 +14,43 @@ > * central refcount exception. The fixup address for the exception points > * back to the regular execution flow in .text. > */ >

Re: [RFC 5/8] x86: refcount: prevent gcc distortions

>>> On 15.05.18 at 16:11, wrote: > --- a/arch/x86/include/asm/refcount.h > +++ b/arch/x86/include/asm/refcount.h > @@ -14,34 +14,43 @@ > * central refcount exception. The fixup address for the exception points > * back to the regular execution flow in .text. > */ > -#define