[PATCH 01/10] staging: erofs: fix `trace_erofs_readpage' position

[Gao Xiang]

Hi Greg,

On 2018/11/22 18:19, Greg Kroah-Hartman wrote:
> On Tue, Nov 20, 2018 at 10:34:16PM +0800, Gao Xiang wrote:
>> `trace_erofs_readpage' should be placed in .readpage()
>> rather than in the internal `z_erofs_do_read_page'.
> Why?  What happens with the code today?
trace_erofs_readpage is used to trace .readpage() interface (it represents sync read)
hook rather than its internal implementation z_erofs_do_read_page (which both .readpage()
and .readpages() uses it). Chen Gong places the tracepoint to a wrong place by mistake.
And we found it by our internal test using this tracepoint.

> 
>> Fixes: 284db12cfda3 ("staging: erofs: add trace points for reading zipped data")
> Should this get into 4.20-final?
I think so, which is not very important but I think it should be fixed...

Thanks,
Gao Xiang

> 
> thanks,
> 
> greg k-h