ANDROID: vendor_hooks: add vendor hook in __alloc_pages()

By this vh, so that we can record page information
and add custom optimisations such as cma.

Bug: 387438223
Bug: 305868227
Change-Id: I6d20dc96f864202ea0ca236c82337f385a9054f6
Signed-off-by: qinglin.li <qinglin.li@amlogic.com>

drivers/android/vendor_hooks.c

@@ -210,3 +210,4 @@ EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_flush_wq_wait_finish);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_flush_work_wait_start);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_flush_work_wait_finish);
 EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_enable_thermal_genl_check);
+EXPORT_TRACEPOINT_SYMBOL_GPL(android_vh_alloc_pages_entry);

include/trace/hooks/mm.h

@@ -78,6 +78,11 @@ DECLARE_HOOK(android_vh_kmalloc_large_alloced,
 DECLARE_RESTRICTED_HOOK(android_rvh_ctl_dirty_rate,
 	TP_PROTO(struct inode *inode),
 	TP_ARGS(inode), 1);
+
+DECLARE_HOOK(android_vh_alloc_pages_entry,
+	TP_PROTO(gfp_t *gfp, unsigned int order, int preferred_nid,
+		nodemask_t *nodemask),
+	TP_ARGS(gfp, order, preferred_nid, nodemask));
 #endif /* _TRACE_HOOK_MM_H */
 
 /* This part must be outside protection */

mm/page_alloc.c

@@ -4735,6 +4735,7 @@ struct page *__alloc_pages_noprof(gfp_t gfp, unsigned int order,
 	gfp_t alloc_gfp; /* The gfp_t that was actually used for allocation */
 	struct alloc_context ac = { };
 
+	trace_android_vh_alloc_pages_entry(&gfp, order, preferred_nid, nodemask);
 	/*
 	 * There are several places where we assume that the order value is sane
 	 * so bail out early if the request is out of bound.