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Subject[PATCH] tracing, ext4: Remove unused trace events
From: Steven Rostedt (VMware) <rostedt@goodmis.org>

Commit 69eb33dc24 ("ext4: remove single extent cache") Removed the only
instances of trace_ext4_ext_put_in_cache and trace_ext4_ext_in_cache.

Commit 7d1b1fbc95 ("ext4: reimplement ext4_find_delay_alloc_range on
extent status tree") removed the last instances of
trace_ext4_find_delalloc_range.

As trace events create data structures and functions even when they are
not used, having them defined without any instances wastes memory.

Remove the unused trace events for ext4.

Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>
---
Index: linux-trace.git/include/trace/events/ext4.h
===================================================================
--- linux-trace.git.orig/include/trace/events/ext4.h
+++ linux-trace.git/include/trace/events/ext4.h
@@ -1885,98 +1885,6 @@ TRACE_EVENT(ext4_get_implied_cluster_all
__entry->len, show_mflags(__entry->flags), __entry->ret)
);

-TRACE_EVENT(ext4_ext_put_in_cache,
- TP_PROTO(struct inode *inode, ext4_lblk_t lblk, unsigned int len,
- ext4_fsblk_t start),
-
- TP_ARGS(inode, lblk, len, start),
-
- TP_STRUCT__entry(
- __field( dev_t, dev )
- __field( ino_t, ino )
- __field( ext4_lblk_t, lblk )
- __field( unsigned int, len )
- __field( ext4_fsblk_t, start )
- ),
-
- TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
- __entry->ino = inode->i_ino;
- __entry->lblk = lblk;
- __entry->len = len;
- __entry->start = start;
- ),
-
- TP_printk("dev %d,%d ino %lu lblk %u len %u start %llu",
- MAJOR(__entry->dev), MINOR(__entry->dev),
- (unsigned long) __entry->ino,
- (unsigned) __entry->lblk,
- __entry->len,
- (unsigned long long) __entry->start)
-);
-
-TRACE_EVENT(ext4_ext_in_cache,
- TP_PROTO(struct inode *inode, ext4_lblk_t lblk, int ret),
-
- TP_ARGS(inode, lblk, ret),
-
- TP_STRUCT__entry(
- __field( dev_t, dev )
- __field( ino_t, ino )
- __field( ext4_lblk_t, lblk )
- __field( int, ret )
- ),
-
- TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
- __entry->ino = inode->i_ino;
- __entry->lblk = lblk;
- __entry->ret = ret;
- ),
-
- TP_printk("dev %d,%d ino %lu lblk %u ret %d",
- MAJOR(__entry->dev), MINOR(__entry->dev),
- (unsigned long) __entry->ino,
- (unsigned) __entry->lblk,
- __entry->ret)
-
-);
-
-TRACE_EVENT(ext4_find_delalloc_range,
- TP_PROTO(struct inode *inode, ext4_lblk_t from, ext4_lblk_t to,
- int reverse, int found, ext4_lblk_t found_blk),
-
- TP_ARGS(inode, from, to, reverse, found, found_blk),
-
- TP_STRUCT__entry(
- __field( dev_t, dev )
- __field( ino_t, ino )
- __field( ext4_lblk_t, from )
- __field( ext4_lblk_t, to )
- __field( int, reverse )
- __field( int, found )
- __field( ext4_lblk_t, found_blk )
- ),
-
- TP_fast_assign(
- __entry->dev = inode->i_sb->s_dev;
- __entry->ino = inode->i_ino;
- __entry->from = from;
- __entry->to = to;
- __entry->reverse = reverse;
- __entry->found = found;
- __entry->found_blk = found_blk;
- ),
-
- TP_printk("dev %d,%d ino %lu from %u to %u reverse %d found %d "
- "(blk = %u)",
- MAJOR(__entry->dev), MINOR(__entry->dev),
- (unsigned long) __entry->ino,
- (unsigned) __entry->from, (unsigned) __entry->to,
- __entry->reverse, __entry->found,
- (unsigned) __entry->found_blk)
-);
-
TRACE_EVENT(ext4_get_reserved_cluster_alloc,
TP_PROTO(struct inode *inode, ext4_lblk_t lblk, unsigned int len),

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