Messages in this thread | | | From | dony <> | Subject | Re: le32_to_cpu() help... | Date | Wed, 3 Nov 1999 02:31:09 +0800 |
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On Tue, 02 Nov 1999, Jes Sorensen wrote: > >>>>> "dony" == dony <dony.he@huawei.com.cn> writes: > > dony> Hi, > > dony> What role does le32_to_cpu() or cpu_to_le32() play in > dony> kernel? Why do we need these two functions? They seem to > dony> translate a value from big-endian to little-endian or vice > dony> versa, but I don't know why we need do this. Thanks. > > They translate data to little endian from big endian on big endian > CPUs, on little endian CPUs like the x86 they are noops. We need these > because some hardware and other things like file systems wants data in > little endian order no matter what type of system you are running on. >
Then when do we use le32_to_cpu( ) , and when do we use cpu_to_le32( )?
-- #################################### Linux is more powerful than windows dony.he@huawei.com.cn ####################################
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