From aca27ba9618276dd2f777bcd5a1419589ccf1ca8 Mon Sep 17 00:00:00 2001 From: Tejun Heo Date: Tue, 3 Aug 2010 13:14:33 +0200 Subject: bio, fs: update RWA_MASK, READA and SWRITE to match the corresponding BIO_RW_* bits Commit a82afdf (block: use the same failfast bits for bio and request) moved BIO_RW_* bits around such that they match up with REQ_* bits. Unfortunately, fs.h hard coded RW_MASK, RWA_MASK, READ, WRITE, READA and SWRITE as 0, 1, 2 and 3, and expected them to match with BIO_RW_* bits. READ/WRITE didn't change but BIO_RW_AHEAD was moved to bit 4 instead of bit 1, breaking RWA_MASK, READA and SWRITE. This patch updates RWA_MASK, READA and SWRITE such that they match the BIO_RW_* bits again. A follow up patch will update the definitions to directly use BIO_RW_* bits so that this kind of breakage won't happen again. Neil also spotted missing RWA_MASK conversion. Stable: The offending commit a82afdf was released with v2.6.32, so this patch should be applied to all kernels since then but it must _NOT_ be applied to kernels earlier than that. Signed-off-by: Tejun Heo Reported-and-bisected-by: Vladislav Bolkhovitin Root-caused-by: Neil Brown Cc: stable@kernel.org Signed-off-by: Jens Axboe diff --git a/include/linux/fs.h b/include/linux/fs.h index c5c9294..55dad7b 100644 --- a/include/linux/fs.h +++ b/include/linux/fs.h @@ -145,12 +145,12 @@ struct inodes_stat_t { * */ #define RW_MASK 1 -#define RWA_MASK 2 +#define RWA_MASK 16 #define READ 0 #define WRITE 1 -#define READA 2 /* readahead - don't block if no resources */ -#define SWRITE 3 /* for ll_rw_block() - wait for buffer lock */ +#define READA 16 /* readahead - don't block if no resources */ +#define SWRITE 17 /* for ll_rw_block(), wait for buffer lock */ #define READ_SYNC (READ | REQ_SYNC | REQ_UNPLUG) #define READ_META (READ | REQ_META) -- cgit v0.10.2