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env: Rename getenv/_f() to env_get()
We are now using an env_ prefix for environment functions. Rename these two functions for consistency. Also add function comments in common.h. Quite a few places use getenv() in a condition context, provoking a warning from checkpatch. These are fixed up in this patch also. Suggested-by: Wolfgang Denk <wd@denx.de> Signed-off-by: Simon Glass <sjg@chromium.org>
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@ -455,7 +455,7 @@ int blk_get_device_part_str(const char *ifname, const char *dev_part_str,
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/* If no dev_part_str, use bootdevice environment variable */
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if (!dev_part_str || !strlen(dev_part_str) ||
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!strcmp(dev_part_str, "-"))
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dev_part_str = getenv("bootdevice");
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dev_part_str = env_get("bootdevice");
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/* If still no dev_part_str, it's an error */
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if (!dev_part_str) {
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