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#undef TRACE_SYSTEM
#define TRACE_SYSTEM xdp

#if !defined(_TRACE_XDP_H) || defined(TRACE_HEADER_MULTI_READ)
#define _TRACE_XDP_H

#include <linux/netdevice.h>
#include <linux/filter.h>
#include <linux/tracepoint.h>

#define __XDP_ACT_MAP(FN)	\
	FN(ABORTED)		\
	FN(DROP)		\
	FN(PASS)		\
	FN(TX)

#define __XDP_ACT_TP_FN(x)	\
	TRACE_DEFINE_ENUM(XDP_##x);
#define __XDP_ACT_SYM_FN(x)	\
	{ XDP_##x, #x },
#define __XDP_ACT_SYM_TAB	\
	__XDP_ACT_MAP(__XDP_ACT_SYM_FN) { -1, 0 }
__XDP_ACT_MAP(__XDP_ACT_TP_FN)

TRACE_EVENT(xdp_exception,

	TP_PROTO(const struct net_device *dev,
		 const struct bpf_prog *xdp, u32 act),

	TP_ARGS(dev, xdp, act),

	TP_STRUCT__entry(
		__string(name, dev->name)
		__array(u8, prog_tag, 8)
		__field(u32, act)
	),

	TP_fast_assign(
		BUILD_BUG_ON(sizeof(__entry->prog_tag) != sizeof(xdp->tag));
		memcpy(__entry->prog_tag, xdp->tag, sizeof(xdp->tag));
		__assign_str(name, dev->name);
		__entry->act = act;
	),

	TP_printk("prog=%s device=%s action=%s",
		  __print_hex_str(__entry->prog_tag, 8),
		  __get_str(name),
		  __print_symbolic(__entry->act, __XDP_ACT_SYM_TAB))
);

#endif /* _TRACE_XDP_H */

#include <trace/define_trace.h>
data to the userspace directly. Other callers like iomap_page_mkwrite work on a single page or iomap_fiemap_actor do not allocate memory based on the given len. Fixes: 68a9f5e7007c ("xfs: implement iomap based buffered write path") Link: http://lkml.kernel.org/r/20170201092706.9966-2-mhocko@kernel.org Signed-off-by: Michal Hocko <mhocko@suse.com> Reported-by: Tetsuo Handa <penguin-kernel@I-love.SAKURA.ne.jp> Reviewed-by: Christoph Hellwig <hch@lst.de> Cc: Al Viro <viro@zeniv.linux.org.uk> Cc: <stable@vger.kernel.org> [4.8+] Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat
-rw-r--r--fs/dax.c5
-rw-r--r--fs/iomap.c3
2 files changed, 8 insertions, 0 deletions
diff --git a/fs/dax.c b/fs/dax.c