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| author | Łukasz Majewski <l.majewski@samsung.com> | 2012-12-05 08:06:37 +0000 |
|---|---|---|
| committer | Tom Rini <trini@ti.com> | 2012-12-07 08:47:52 -0700 |
| commit | 32fc16d7e7a81816ce247b7cd70c94f3210a228b (patch) | |
| tree | 78b4f9231a15b7b441d0978d348e06b15199ade3 /fs/ext4 | |
| parent | 3fdf7596dff87a79e2b41d07479c608d91d06cb3 (diff) | |
| download | u-boot-32fc16d7e7a81816ce247b7cd70c94f3210a228b.tar.gz u-boot-32fc16d7e7a81816ce247b7cd70c94f3210a228b.tar.xz u-boot-32fc16d7e7a81816ce247b7cd70c94f3210a228b.zip | |
fs:ext4:write: Add lldiv and do_div to perform 64-32 bits division
The ext4write code has been using direct calls to 64-32 division
(/ and %).
Officially supported u-boot toolchains (eldk-5.[12].x) generate calls
to __aeabi_uldivmod(), which is niether defined in the toolchain libs
nor u-boot source tree.
Due to that, when the ext4write command has been executed, "undefined
instruction" execption was generated (since the __aeabi_uldivmod()
is not provided).
To fix this error, lldiv() for division and do_div() for modulo have
been used.
Those two functions are recommended for performing 64-32 bit number
division in u-boot.
Signed-off-by: Lukasz Majewski <l.majewski@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Diffstat (limited to 'fs/ext4')
| -rw-r--r-- | fs/ext4/ext4fs.c | 5 |
1 files changed, 3 insertions, 2 deletions
diff --git a/fs/ext4/ext4fs.c b/fs/ext4/ext4fs.c index 06536baf62..80b3b90907 100644 --- a/fs/ext4/ext4fs.c +++ b/fs/ext4/ext4fs.c @@ -40,6 +40,7 @@ #include <linux/stat.h> #include <linux/time.h> #include <asm/byteorder.h> +#include <div64.h> #include "ext4_common.h" int ext4fs_symlinknest; @@ -1051,8 +1052,8 @@ int ext4fs_write(const char *fname, unsigned char *buffer, } /* calucalate how many blocks required */ bytes_reqd_for_file = sizebytes; - blks_reqd_for_file = bytes_reqd_for_file / fs->blksz; - if (bytes_reqd_for_file % fs->blksz != 0) { + blks_reqd_for_file = lldiv(bytes_reqd_for_file, fs->blksz); + if (do_div(bytes_reqd_for_file, fs->blksz) != 0) { blks_reqd_for_file++; debug("total bytes for a file %u\n", blks_reqd_for_file); } |