The patch titled Subject: tmpfs: disallow CONFIG_TMPFS_INODE64 on alpha has been added to the -mm tree. Its filename is tmpfs-disallow-config_tmpfs_inode64-on-alpha.patch

This patch should soon appear at https://ozlabs.org/~akpm/mmots/broken-out/tmpfs-disallow-config_tmpfs_inode6... and later at https://ozlabs.org/~akpm/mmotm/broken-out/tmpfs-disallow-config_tmpfs_inode6...

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------------------------------------------------------ From: Seth Forshee seth.forshee@canonical.com Subject: tmpfs: disallow CONFIG_TMPFS_INODE64 on alpha

As with s390, alpha is a 64-bit architecture with a 32-bit ino_t. With CONFIG_TMPFS_INODE64=y tmpfs mounts will get 64-bit inode numbers and display "inode64" in the mount options, whereas passing "inode64" in the mount options will fail. This leads to erroneous behaviours such as this:

# mkdir mnt # mount -t tmpfs nodev mnt # mount -o remount,rw mnt mount: /home/ubuntu/mnt: mount point not mounted or bad option.

Prevent CONFIG_TMPFS_INODE64 from being selected on alpha.

Link: https://lkml.kernel.org/r/20210208215726.608197-1-seth.forshee@canonical.com Fixes: ea3271f7196c ("tmpfs: support 64-bit inums per-sb") Signed-off-by: Seth Forshee seth.forshee@canonical.com Cc: Chris Down chris@chrisdown.name Cc: Amir Goldstein amir73il@gmail.com Cc: Richard Henderson rth@twiddle.net Cc: Ivan Kokshaysky ink@jurassic.park.msu.ru Cc: Matt Turner mattst88@gmail.com Cc: stable@vger.kernel.org [5.9+] Signed-off-by: Andrew Morton akpm@linux-foundation.org ---

fs/Kconfig | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)

--- a/fs/Kconfig~tmpfs-disallow-config_tmpfs_inode64-on-alpha +++ a/fs/Kconfig @@ -203,7 +203,7 @@ config TMPFS_XATTR

config TMPFS_INODE64 bool "Use 64-bit ino_t by default in tmpfs" - depends on TMPFS && 64BIT && !S390 + depends on TMPFS && 64BIT && !(S390 || ALPHA) default n help tmpfs has historically used only inode numbers as wide as an unsigned _

Patches currently in -mm which might be from seth.forshee@canonical.com are

tmpfs-disallow-config_tmpfs_inode64-on-s390.patch tmpfs-disallow-config_tmpfs_inode64-on-alpha.patch