linux-kernel - [PATCH] tmpfs: Disallow CONFIG_TMPFS

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Date:   Fri,  5 Feb 2021 17:06:20 -0600
From:   Seth Forshee <seth.forshee@...onical.com>
To:     Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>
Cc:     Chris Down <chris@...isdown.name>,
        Amir Goldstein <amir73il@...il.com>,
        Heiko Carstens <hca@...ux.ibm.com>,
        Vasily Gorbik <gor@...ux.ibm.com>,
        Christian Borntraeger <borntraeger@...ibm.com>,
        linux-mm@...ck.org, linux-s390@...r.kernel.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] tmpfs: Disallow CONFIG_TMPFS_INODE64 on s390

This feature requires ino_t be 64-bits, which is true for every
64-bit architecture but s390, so prevent this option from being
selected there.

Fixes: ea3271f7196c ("tmpfs: support 64-bit inums per-sb")
Cc: <stable@...r.kernel.org> # v5.9+
Signed-off-by: Seth Forshee <seth.forshee@...onical.com>
---
 fs/Kconfig | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/fs/Kconfig b/fs/Kconfig
index aa4c12282301..3347ec7bd837 100644
--- a/fs/Kconfig
+++ b/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
+	depends on TMPFS && 64BIT && !S390
 	default n
 	help
 	  tmpfs has historically used only inode numbers as wide as an unsigned
-- 
2.29.2