[PATCH] fat: fix sector print

From: Arnd Bergmann
Date: Fri Jun 08 2018 - 10:40:21 EST


Printing a sector_t using %ld fails when that is a 64-bit type on
32-bit architectures:

fs/fat/inode.c: In function '__fat_get_block':
fs/fat/inode.c:163:9: error: format '%ld' expects argument of type 'long int', but argument 5 has type 'sector_t' {aka 'long long unsigned int'} [-Werror=format=]
"invalid FAT chain (i_pos %lld, last_block %ld)",

The common workaround is to cast the number to a 64-bit type and print that
as %lld, that works in all configurations.

Fixes: mmotm ("fat: use fat_fs_error() instead of BUG_ON() in __fat_get_block()")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
---
fs/fat/inode.c | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/fat/inode.c b/fs/fat/inode.c
index d380d0f844bb..d168df5a4a73 100644
--- a/fs/fat/inode.c
+++ b/fs/fat/inode.c
@@ -160,8 +160,8 @@ static inline int __fat_get_block(struct inode *inode, sector_t iblock,
return err;
if (!phys) {
fat_fs_error(sb,
- "invalid FAT chain (i_pos %lld, last_block %ld)",
- MSDOS_I(inode)->i_pos, last_block);
+ "invalid FAT chain (i_pos %lld, last_block %llu)",
+ MSDOS_I(inode)->i_pos, (u64)last_block);
return -EIO;
}

--
2.9.0