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C51: L48: IGNORED RECURSIVE CALL

I just migrated a project from Keil 3 to Keil 5 (C51 = V9.56.0.0 & LX51 4.66.66.0

I get the following (new) warnings:

*** WARNING L48: IGNORED RECURSIVE CALL CALLED: _SMBUS_SET_PACKET_DATA/SMBUS CALLER: SMBUS
*** WARNING L48: IGNORED RECURSIVE CALL CALLED: SMBUS CALLER: _SMBUS_SET_PACKET_DATA/SMBUS

puzzle is that while there is a routine called smbus_set_packet_data there is no routine called smbus. In fact the routine is reproduced below:

static void smbus_set_packet_data(uint8_t pos, uint8_t val,uint8_t info) { smbus_packet[pos] = val; smbus_packet_info[pos] = info;
}

What does the above warning indicate?

What exactly did the linker ignore? (Any calling sequence not included in the final binary?

thanks for the clarifications.