I removed the IRAM_ATTR from function prototype and kept in the function only. The warning was resolved.

Hello, I'am facing the similar problem with migration to sdk5.0. I'am using IRAM_ATTR twice in my code, so i get two warnings from Eclipse IDE: ignoring attribute 'section (".iram1.2")' because it conflicts with previous 'section (".iram1.0")' [-Wattributes] ignoring attribute 'section (".iram1.3")'...