What does 'if EMBEDDED' mean?

[jidong xiao]

For example,

config SYSFS
        bool "sysfs file system support" if EMBEDDED
        default y

What does 'if EMBEDDED' mean?Can I choose n here?
I saw there is no corresponding option within `make menuconfig`, so I
am wondering what can I do if I wanna to disable this option, directly
change
"default y" to "default n" in the Kconfig file?

Thanks
Jason
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