Add samsung specific changes

include/linux/sec_mm.h

@@ -0,0 +1,89 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef _SEC_MM_H
+#define _SEC_MM_H
+
+#include <linux/mm.h>
+#include <linux/page-isolation.h>
+#include <linux/seq_file.h>
+
+#define GB_TO_PAGES(x) ((x) << (30 - PAGE_SHIFT))
+#define MB_TO_PAGES(x) ((x) << (20 - PAGE_SHIFT))
+#define K(x) ((x) << (PAGE_SHIFT-10))
+
+static inline void show_val_meminfo(struct seq_file *m,
+			const char *str, long size)
+{
+	char name[17];
+	int len = strlen(str);
+
+	if (len <= 15) {
+		sprintf(name, "%s:", str);
+	} else {
+		strncpy(name, str, 15);
+		name[15] = ':';
+		name[16] = '\0';
+	}
+
+	seq_printf(m, "%-16s%8ld kB\n", name, size);
+}
+
+static inline bool is_migrate_cma_or_isolate_page(struct page *page)
+{
+	int migratetype = get_pageblock_migratetype(page);
+
+	return is_migrate_cma(migratetype) || is_migrate_isolate(migratetype);
+}
+
+extern struct ratelimit_state dump_tasks_rs;
+#ifdef CONFIG_SEC_MM_DUMP_DMABUF_TASKS
+extern struct ratelimit_state dma_buf_tasks_rs;
+#endif
+extern struct atomic_notifier_head am_app_launch_notifier;
+extern bool am_app_launch;
+extern unsigned int mmap_readaround_limit;
+
+#ifdef CONFIG_RBIN
+void wake_dmabuf_rbin_heap_prereclaim(void);
+#endif
+
+static inline bool file_is_tiny(unsigned long low_threshold)
+{
+	return (global_node_page_state(NR_ACTIVE_FILE) +
+		global_node_page_state(NR_INACTIVE_FILE)) < low_threshold;
+}
+
+static inline unsigned long get_low_threshold(void)
+{
+	if (totalram_pages() > GB_TO_PAGES(4))
+		return MB_TO_PAGES(500);
+	else if (totalram_pages() > GB_TO_PAGES(3))
+		return MB_TO_PAGES(400);
+	else if (totalram_pages() > GB_TO_PAGES(2))
+		return MB_TO_PAGES(300);
+	else
+		return MB_TO_PAGES(200);
+}
+
+bool mem_boost_mode_high(void);
+
+void mm_debug_dump_tasks(void);
+#ifdef CONFIG_SEC_MM_DUMP_DMABUF_TASKS
+void mm_debug_dump_dma_buf_tasks(void);
+#endif
+
+void init_lowfile_detect(void);
+void exit_lowfile_detect(void);
+
+void init_panic_handler(void);
+void exit_panic_handler(void);
+
+void init_sec_mm_debug(void);
+void exit_sec_mm_debug(void);
+
+void init_sec_mm_tune(void);
+void exit_sec_mm_tune(void);
+
+void init_sec_mm_sysfs(void);
+void exit_sec_mm_sysfs(void);
+
+#endif /* _SEC_MM_H */