* Tom Lendacky <thomas.lenda...@amd.com> wrote: > Create a new function attribute, __nostackp, that can used to turn off > stack protection on a per function basis. > > Signed-off-by: Tom Lendacky <thomas.lenda...@amd.com> > --- > include/linux/compiler-gcc.h | 2 ++ > include/linux/compiler.h | 4 ++++ > 2 files changed, 6 insertions(+) > > diff --git a/include/linux/compiler-gcc.h b/include/linux/compiler-gcc.h > index cd4bbe8..682063b 100644 > --- a/include/linux/compiler-gcc.h > +++ b/include/linux/compiler-gcc.h > @@ -166,6 +166,8 @@ > > #if GCC_VERSION >= 40100 > # define __compiletime_object_size(obj) __builtin_object_size(obj, 0) > + > +#define __nostackp __attribute__((__optimize__("no-stack-protector"))) > #endif > > #if GCC_VERSION >= 40300 > diff --git a/include/linux/compiler.h b/include/linux/compiler.h > index 219f82f..63cbca1 100644 > --- a/include/linux/compiler.h > +++ b/include/linux/compiler.h > @@ -470,6 +470,10 @@ static __always_inline void __write_once_size(volatile > void *p, void *res, int s > #define __visible > #endif > > +#ifndef __nostackp > +#define __nostackp > +#endif
So I changed this from the hard to read and ambiguous "__nostackp" abbreviation (does it mean 'no stack pointer?') to "__nostackprotector", plus added this detail to the changelog: | ( This is needed by the SME in-place kernel memory encryption feature, | which activates encryption in its sme_enable() function and thus changes the | visible value of the stack protection cookie on function return. ) Agreed? Thanks, Ingo -- To unsubscribe from this list: send the line "unsubscribe linux-doc" in the body of a message to majord...@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html