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| author | Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com> | 2011-08-04 19:00:33 -0300 |
|---|---|---|
| committer | Greg Kroah-Hartman <gregkh@suse.de> | 2011-08-08 12:05:34 -0700 |
| commit | 3ca15c4486beb113700cda44e32109cf0d97528b (patch) | |
| tree | 099ee5fff1cd27dfbc7fe070cfb9bb4312355936 /drivers/staging/zcache | |
| parent | f704648281831fbb8a4ca1acbe18cb84bc0267c8 (diff) | |
| download | blackbird-obmc-linux-3ca15c4486beb113700cda44e32109cf0d97528b.tar.gz blackbird-obmc-linux-3ca15c4486beb113700cda44e32109cf0d97528b.zip | |
zcache: Use div_u64 for 64-bit division
xv_get_total_size_bytes returns a u64 value and it's used in a division.
This causes build failures in 32-bit architectures, as reported by Randy
Dunlap.
Reported-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Thadeu Lima de Souza Cascardo <cascardo@holoscopio.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Cc: Dan Magenheimer <dan.magenheimer@oracle.com>
Cc: Nitin Gupta <ngupta@vflare.org>
Acked-by: Randy Dunlap <rdunlap@xenotime.net>
Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
Diffstat (limited to 'drivers/staging/zcache')
| -rw-r--r-- | drivers/staging/zcache/zcache-main.c | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/drivers/staging/zcache/zcache-main.c b/drivers/staging/zcache/zcache-main.c index 66469acce58e..2c41c4465e14 100644 --- a/drivers/staging/zcache/zcache-main.c +++ b/drivers/staging/zcache/zcache-main.c @@ -28,6 +28,7 @@ #include <linux/spinlock.h> #include <linux/types.h> #include <linux/atomic.h> +#include <linux/math64.h> #include "tmem.h" #include "../zram/xvmalloc.h" /* if built in drivers/staging */ @@ -1162,6 +1163,7 @@ static void *zcache_pampd_create(char *data, size_t size, bool raw, int eph, uint16_t client_id = get_client_id_from_client(cli); unsigned long zv_mean_zsize; unsigned long curr_pers_pampd_count; + u64 total_zsize; if (eph) { ret = zcache_compress(page, &cdata, &clen); @@ -1194,8 +1196,9 @@ static void *zcache_pampd_create(char *data, size_t size, bool raw, int eph, } /* reject if mean compression is too poor */ if ((clen > zv_max_mean_zsize) && (curr_pers_pampd_count > 0)) { - zv_mean_zsize = xv_get_total_size_bytes(cli->xvpool) / - curr_pers_pampd_count; + total_zsize = xv_get_total_size_bytes(cli->xvpool); + zv_mean_zsize = div_u64(total_zsize, + curr_pers_pampd_count); if (zv_mean_zsize > zv_max_mean_zsize) { zcache_mean_compress_poor++; goto out; |
