From: Arnd Bergmann <arnd@xxxxxxxx>
The ecryptfs file system uses functions from fs/buffer.c that
are only available when CONFIG_BUFFER_HEAD is enabled:
ld.lld-20: error: undefined symbol: block_dirty_folio
>>> vmlinux.o:(ecryptfs_aops)
ld.lld-20: error: undefined symbol: block_invalidate_folio
>>> vmlinux.o:(ecryptfs_aops)
When CONFIG_BLOCK is turned off completely, this is not needed,
so add a conditional 'select BUFFER_HEAD'.
Fixes: 7ba13abbd31e ("fs: Turn block_invalidatepage into block_invalidate_folio")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
Ideally we would not depend on buffer heads and instead remove
the dependency here, but I could not immediately figure out how
to do that.
---
fs/ecryptfs/Kconfig | 1 +
1 file changed, 1 insertion(+)
diff --git a/fs/ecryptfs/Kconfig b/fs/ecryptfs/Kconfig
index 1bdeaa6d5790..b3c603c4f808 100644
--- a/fs/ecryptfs/Kconfig
+++ b/fs/ecryptfs/Kconfig
@@ -2,6 +2,7 @@
config ECRYPT_FS
tristate "eCrypt filesystem layer support"
depends on KEYS && CRYPTO && (ENCRYPTED_KEYS || ENCRYPTED_KEYS=n)
+ select BUFFER_HEAD if BLOCK
select CRYPTO_ECB
select CRYPTO_CBC
select CRYPTO_MD5
--
2.39.5
