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linux/fs/namespace.c
Christian Brauner e75e091a33 fs: ensure that internal tmpfs mount gets mount id zero 
[ Upstream commit a2062463e8 ]

and the rootfs get mount id one as it always has. Before we actually
mount the rootfs we create an internal tmpfs mount which has mount id
zero but is never exposed anywhere. Continue that "tradition".

Link: https://patch.msgid.link/20260112-work-immutable-rootfs-v2-1-88dd1c34a204@kernel.org
Fixes: 7f9bfafc5f ("fs: use xarray for old mount id")
Reviewed-by: Jeff Layton <jlayton@kernel.org>
Cc: stable@vger.kernel.org
Signed-off-by: Christian Brauner <brauner@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
2026-03-04 07:21:00 -05:00

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