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authorChristoph Hellwig <hch@lst.de>2008-02-08 04:20:26 -0800
committerLinus Torvalds <torvalds@woody.linux-foundation.org>2008-02-08 09:22:34 -0800
commit8b88b0998e35d239e74446cc30f354bdab86df89 (patch)
treec13773b744cf12b1e30ec9336a4acaf21e46c6d9 /arch/avr32
parentefae09f3e99fcc1bdead7bc23a508b3bade3f82f (diff)
downloadlinux-8b88b0998e35d239e74446cc30f354bdab86df89.tar.bz2
libfs: allow error return from simple attributes
Sometimes simple attributes might need to return an error, e.g. for acquiring a mutex interruptibly. In fact we have that situation in spufs already which is the original user of the simple attributes. This patch merged the temporarily forked attributes in spufs back into the main ones and allows to return errors. [akpm@linux-foundation.org: build fix] Signed-off-by: Christoph Hellwig <hch@lst.de> Cc: <stefano.brivio@polimi.it> Cc: Arnd Bergmann <arnd@arndb.de> Cc: Greg KH <greg@kroah.com> Cc: Al Viro <viro@zeniv.linux.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'arch/avr32')
-rw-r--r--arch/avr32/kernel/ocd.c18
1 files changed, 11 insertions, 7 deletions
diff --git a/arch/avr32/kernel/ocd.c b/arch/avr32/kernel/ocd.c
index c4f023294d75..1b0245d4e0ca 100644
--- a/arch/avr32/kernel/ocd.c
+++ b/arch/avr32/kernel/ocd.c
@@ -90,25 +90,29 @@ static struct dentry *ocd_debugfs_DC;
static struct dentry *ocd_debugfs_DS;
static struct dentry *ocd_debugfs_count;
-static u64 ocd_DC_get(void *data)
+static int ocd_DC_get(void *data, u64 *val)
{
- return ocd_read(DC);
+ *val = ocd_read(DC);
+ return 0;
}
-static void ocd_DC_set(void *data, u64 val)
+static int ocd_DC_set(void *data, u64 val)
{
ocd_write(DC, val);
+ return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_DC, ocd_DC_get, ocd_DC_set, "0x%08llx\n");
-static u64 ocd_DS_get(void *data)
+static int ocd_DS_get(void *data, u64 *val)
{
- return ocd_read(DS);
+ *val = ocd_read(DS);
+ return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_DS, ocd_DS_get, NULL, "0x%08llx\n");
-static u64 ocd_count_get(void *data)
+static int ocd_count_get(void *data, u64 *val)
{
- return ocd_count;
+ *val = ocd_count;
+ return 0;
}
DEFINE_SIMPLE_ATTRIBUTE(fops_count, ocd_count_get, NULL, "%lld\n");