On Mon, Apr 15, 2013 at 12:32 PM, Ben Wu <[email protected]> wrote: > > Dear All ，Im new to linux kernel program, and found struct pointer is > difficult to understand, that the struct s3c_i2sv2_info *i2s = > snd_soc_dai_get_drvdata(cpu_dai) means,? why is use the struct pointer > assgn another struct pointer?? > > > static int s3c2412_i2s_hw_params(struct snd_pcm_substream *substream, > struct snd_pcm_hw_params *params, > struct snd_soc_dai *cpu_dai) > { > struct s3c_i2sv2_info *i2s = snd_soc_dai_get_drvdata(cpu_dai); > struct s3c_dma_params *dma_data; > .................................................................... > } > _______________________________________________ > Kernelnewbies mailing list > [email protected] > http://lists.kernelnewbies.org/mailman/listinfo/kernelnewbies > >
Have a look at a utility binary "cdecl". This will help you greatly. However, the statement above means, snd_soc... is a function which takes a argument which is a pointer and returns a pointer to struct s3c_.. Here the pointer i2s is declared and initialize. Else it will do nasty thing if you try to de-reference it. Thanks,
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