root/include/trace/events/filemap.h

#undef TRACE_SYSTEM
#define TRACE_SYSTEM filemap

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

#include <linux/types.h>
#include <linux/tracepoint.h>
#include <linux/mm.h>
#include <linux/memcontrol.h>
#include <linux/device.h>
#include <linux/kdev_t.h>

DECLARE_EVENT_CLASS(mm_filemap_op_page_cache,

        TP_PROTO(struct page *page),

        TP_ARGS(page),

        TP_STRUCT__entry(
                __field(struct page *, page)
                __field(unsigned long, i_ino)
                __field(unsigned long, index)
                __field(dev_t, s_dev)
        ),

        TP_fast_assign(
                __entry->page = page;
                __entry->i_ino = page->mapping->host->i_ino;
                __entry->index = page->index;
                if (page->mapping->host->i_sb)
                        __entry->s_dev = page->mapping->host->i_sb->s_dev;
                else
                        __entry->s_dev = page->mapping->host->i_rdev;
        ),

        TP_printk("dev %d:%d ino %lx page=%p pfn=%lu ofs=%lu",
                MAJOR(__entry->s_dev), MINOR(__entry->s_dev),
                __entry->i_ino,
                __entry->page,
                page_to_pfn(__entry->page),
                __entry->index << PAGE_SHIFT)
);

DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_delete_from_page_cache,
        TP_PROTO(struct page *page),
        TP_ARGS(page)
        );

DEFINE_EVENT(mm_filemap_op_page_cache, mm_filemap_add_to_page_cache,
        TP_PROTO(struct page *page),
        TP_ARGS(page)
        );

#endif /* _TRACE_FILEMAP_H */

/* This part must be outside protection */
#include <trace/define_trace.h>