kernel panic not syncing no working init found

[HSR Hackspace]

Hi folks;

I'm trying to EFI boot Linux first time using Grub with below grub.cfg and
I'm getting kernel panic message. Can someone review kindly my config. Mine
is a x86_64 box with FreeBSD. I have installed grub2-efi port of FreeBSD.
Linux is not in ESP but in a separate FAT32 partition. Since Linux is
expected to UEFI boot from ESP which is again FAT 32 partition I am
assuming file system of Linux is not an issue. Linux have efi stub support
enabled. Rooftfs is build-in and there is no separate rootfs image. My only
concern if I have to specify FAT32  file system (of Linux) in config
somewhere.

My grub.cfg:

menuentry "Linux" {
insmod part_msdos
insmod efi_gop
insmod gfxterm
insmod font
insmod videotest
insmod videoinfo
set gfxmode=auto
set kernvt="vt"
    set root=(hd0,7)
    echo "loading kernel"
    echo "###############################################################"
    linux /boot/bzImage-4.1.21-WR8.0.0.10_standard root=/dev/sda7
    echo "#####################LOADED KERNEL#############################"
}


file bzImage-4.1.21-WR8.0.0.10_standard
bzImage-4.1.21-WR8.0.0.10_standard: Linux kernel x86 boot executable
bzImage, version 4.1.21-WR8.0.0.10_standard (address@hidden) #1 SMP
PREEMPT Su, RO-rootFS, swap_dev 0x6, Normal VGA


​
Am I missing anything critical in config?

T & R
_SP