Kernel didn't update

[lanzariel]

I wanted to update kernel from 5.15.8 to 5.15.10
But I had no success, it keeps booting with 1.15.8

To Reproduce
After an update I couldn't boot. I faced the error

Unable to mount /boot. unknown filesystem type 'vfat'

for this reason I have downgraded the kernel to 5.18 and installed kernel-modules-hook. I hope this isn't the root of all evil...

after reinstalling the last kernel I ran:

$ mkinitcpio -p linux

==> Building image from preset: /etc/mkinitcpio.d/linux.preset: 'default'
  -> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux.img
==> Starting build: 5.15.10-arch1-1
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [keyboard]
==> WARNING: Possibly missing firmware for module: xhci_pci
  -> Running build hook: [consolefont]
==> WARNING: consolefont: no font found in configuration
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: aic94xx
==> WARNING: Possibly missing firmware for module: wd719x
  -> Running build hook: [filesystems]
  -> Running build hook: [keyboard]
  -> Running build hook: [fsck]
==> Generating module dependencies
==> Creating zstd-compressed initcpio image: /boot/initramfs-linux.img
==> Image generation successful
==> Building image from preset: /etc/mkinitcpio.d/linux.preset: 'fallback'
  -> -k /boot/vmlinuz-linux -c /etc/mkinitcpio.conf -g /boot/initramfs-linux-fallback.img -S autodetect
==> Starting build: 5.15.10-arch1-1
  -> Running build hook: [base]
  -> Running build hook: [udev]
  -> Running build hook: [keyboard]
==> WARNING: Possibly missing firmware for module: xhci_pci
  -> Running build hook: [consolefont]
==> WARNING: consolefont: no font found in configuration
  -> Running build hook: [block]
==> WARNING: Possibly missing firmware for module: aic94xx
==> WARNING: Possibly missing firmware for module: wd719x
  -> Running build hook: [filesystems]
  -> Running build hook: [keyboard]
  -> Running build hook: [fsck]
==> Generating module dependencies
==> Creating zstd-compressed initcpio image: /boot/initramfs-linux-fallback.img
==> Image generation successful

then made sure that grub was updated with

$ grub-mkconfig -o /boot/grub/grub.cfg

Generating grub configuration file ...
Found linux image: /boot/vmlinuz-linux
Found initrd image: /boot/initramfs-linux.img
Found fallback initrd image(s) in /boot:  initramfs-linux-fallback.img
Warning: os-prober will not be executed to detect other bootable partitions.
Systems on them will not be added to the GRUB boot configuration.
Check GRUB_DISABLE_OS_PROBER documentation entry.
Adding boot menu entry for UEFI Firmware Settings ...
done

Then rebooted

Expected behavior
I would have expected to have 5.15.10, however I got

sudo uname -a
Linux SanDiskGuest 5.15.8-arch1-1 #1 SMP PREEMPT Tue, 14 Dec 2021 12:28:02 +0000 x86_64 GNU/Linux

despite the fact that

sudo pacman -Q --info linux
Name            : linux
Version         : 5.15.10.arch1-1
Description     : The Linux kernel and modules
Architecture    : x86_64
URL             : https://github.com/archlinux/linux/commits/v5.15.10-arch1
Licenses        : GPL2
Groups          : None
Provides        : VIRTUALBOX-GUEST-MODULES  WIREGUARD-MODULE
Depends On      : coreutils  kmod  initramfs
Optional Deps   : crda: to set the correct wireless channels of your country
                  linux-firmware: firmware images needed for some devices
                  [installed]
Required By     : broadcom-wl
Optional For    : base
Conflicts With  : None
Replaces        : virtualbox-guest-modules-arch  wireguard-arch
Installed Size  : 135.25 MiB
Packager        : Jan Alexander Steffens (heftig) <heftig@archlinux.org>
Build Date      : Fri 17 Dec 2021 11:17:37 AM UTC
Install Date    : Sun 19 Dec 2021 08:19:29 AM UTC
Install Reason  : Explicitly installed
Install Script  : No
Validated By    : Signature