Re: [PATCH v3 7/8] powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI

2016-03-03 Thread Balbir Singh
On 03/03/16 15:26, Michael Ellerman wrote: > From: Torsten Duwe > > The gcc switch -mprofile-kernel defines a new ABI for calling _mcount() > very early in the function with minimal overhead. > > Although mprofile-kernel has been available since GCC 3.4, there were > bugs which

Re: [PATCH v3 7/8] powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI

2016-03-03 Thread Balbir Singh
On 03/03/16 15:26, Michael Ellerman wrote: > From: Torsten Duwe > > The gcc switch -mprofile-kernel defines a new ABI for calling _mcount() > very early in the function with minimal overhead. > > Although mprofile-kernel has been available since GCC 3.4, there were > bugs which were only fixed

[PATCH v3 7/8] powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI

2016-03-02 Thread Michael Ellerman
From: Torsten Duwe The gcc switch -mprofile-kernel defines a new ABI for calling _mcount() very early in the function with minimal overhead. Although mprofile-kernel has been available since GCC 3.4, there were bugs which were only fixed recently. Currently it is known to work in

[PATCH v3 7/8] powerpc/ftrace: Add support for -mprofile-kernel ftrace ABI

2016-03-02 Thread Michael Ellerman
From: Torsten Duwe The gcc switch -mprofile-kernel defines a new ABI for calling _mcount() very early in the function with minimal overhead. Although mprofile-kernel has been available since GCC 3.4, there were bugs which were only fixed recently. Currently it is known to work in GCC 4.9, 5 and