Is `IS_ERR_VALUE` indicates that the return value is invalid?
From: 乃宏周 <hidden>
Date: 2013-11-07 05:41:07
In kernel source, `IS_ERR_VALUE` is defined:
#define IS_ERR_VALUE(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
It's usage can be realized literally, but definition is not.
Can I use this macro to determines the kernel API's result is valid?
Example:
if (IS_ERR_VALUE(filp_open(device)))
{
filp_close(device);
}
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