linux-kernel - Re: [PATCH v2] f2fs: merge f2fs_show_injection_info() into time_to

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Date:   Tue, 20 Dec 2022 15:24:47 +0800
From:   Chao Yu <chao@...nel.org>
To:     Yangtao Li <frank.li@...o.com>, jaegeuk@...nel.org
Cc:     linux-f2fs-devel@...ts.sourceforge.net,
        linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] f2fs: merge f2fs_show_injection_info() into
 time_to_inject()

On 2022/12/19 21:25, Yangtao Li wrote:
> There is no need to additionally use f2fs_show_injection_info()
> to output information. Concatenate time_to_inject() and
> __time_to_inject() via a macro. In the new __time_to_inject()
> function, pass in the caller function name. And in order to avoid
> this inline function is not expanded causing __builtin_return_address(0)
> return address of of time_to_inject(), mark time_to_inject() as
> __always_inline.

IMO, we'd better have a good reason (maybe performace related) to change
inline to __always_inline, rather than avoiding printed message change
due to compile option.

> -static inline bool time_to_inject(struct f2fs_sb_info *sbi, int type)
> +#define time_to_inject(sbi, type) __time_to_inject(sbi, type, __func__)
> +static __always_inline bool __time_to_inject(struct f2fs_sb_info *sbi, int type,
> +								    const char *func_name)

How about:

#define time_to_inject(sbi, type) __time_to_inject(sbi, type, __func__,	\
					__builtin_return_address(0))
static inline bool __time_to_inject(struct f2fs_sb_info *sbi, int type,
				const char *func, const char *parent_func)

Thanks,