Search notes:

lib/

kstrtox.c : Convert strings to integers (or -E)

kstrtoull, kstrtoll, _kstroul, _kstrtol, kstrouint, kstrtoint, kstrtou16, kstrtos16, kstrtou8, kstrtos8 kstrtobool, kstrtobool_from_user
See also include/linux/kstrtox.h

string_helpers.c : Formatting and printing strings

string_get_size - get the size in the specified units
…

vsprintf.c : String conversion functions

simple_strtoX functions.
X = ull (unsigned long long), ul (unsigned long), l (signed long) or ll (signed long long).
These functions have caveats, kstrtoX should be used.
Xprintf functions. X = vsn, vscn, sn, scn, vs, s, vbin_, bstr_, b
Xscanf functions.
X = vs, s

See also

Linux kernel source tree

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