drivers/mtd/chips/cfi_util.o: warning: objtool: cfi_qry_present() falls through to next function cfi_udelay()

[kbuild test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   9aa0d2dde6ebd14e9d16e28081a24721d5b41cc8
commit: ee97638b5737cc0dba2f12a3bdcda761656b7c01 objtool: Fix objtool fallthrough detection with function padding
date:   8 weeks ago
config: x86_64-randconfig-h0-10141638 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        git checkout ee97638b5737cc0dba2f12a3bdcda761656b7c01
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All warnings (new ones prefixed by >>):

>> drivers/mtd/chips/cfi_util.o: warning: objtool: cfi_qry_present() falls through to next function cfi_udelay()

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