On 2015/5/29 15:14, Paul Bolle wrote:
> On Thu, 2015-05-28 at 13:51 +0800, Li Bin wrote:
>> --- a/arch/arm64/Kconfig
>> +++ b/arch/arm64/Kconfig
>
>> select HAVE_DYNAMIC_FTRACE
>> +select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
>
> What's the point of "if
On Thu, 2015-05-28 at 13:51 +0800, Li Bin wrote:
> --- a/arch/arm64/Kconfig
> +++ b/arch/arm64/Kconfig
> select HAVE_DYNAMIC_FTRACE
> + select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
What's the point of "if HAVE_DYNAMIC_FTRACE" here? That test should
always evaluate to
On Thu, 2015-05-28 at 13:51 +0800, Li Bin wrote:
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
select HAVE_DYNAMIC_FTRACE
+ select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
What's the point of if HAVE_DYNAMIC_FTRACE here? That test should
always evaluate to true,
On 2015/5/29 15:14, Paul Bolle wrote:
On Thu, 2015-05-28 at 13:51 +0800, Li Bin wrote:
--- a/arch/arm64/Kconfig
+++ b/arch/arm64/Kconfig
select HAVE_DYNAMIC_FTRACE
+select HAVE_DYNAMIC_FTRACE_WITH_REGS if HAVE_DYNAMIC_FTRACE
What's the point of if HAVE_DYNAMIC_FTRACE here? That
If ftrace_ops is registered with flag FTRACE_OPS_FL_SAVE_REGS, the
arch that support DYNAMIC_FTRACE_WITH_REGS will pass a full set of
pt_regs to the ftrace_ops callback function, which may read or change
the value of the pt_regs and the pt_regs will be restored to support
work flow redirection
If ftrace_ops is registered with flag FTRACE_OPS_FL_SAVE_REGS, the
arch that support DYNAMIC_FTRACE_WITH_REGS will pass a full set of
pt_regs to the ftrace_ops callback function, which may read or change
the value of the pt_regs and the pt_regs will be restored to support
work flow redirection
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