Revert "mm: kmemleak: alloc gray object for reserved region with direct map"

JIRA: https://issues.redhat.com/browse/RHEL-75156

Conflicts: RHEL-9 has early_init_dt_reserve_memory_arch() while upstream
	   was refactored to early_init_dt_reserve_memory() in commit
	   f8a855e (of/fdt: Clean up early_init_dt_reserve_memory_arch())

commit 8ef852f
Author: "Isaac J. Manjarres" <isaacmanjarres@google.com>
Date: Tue, 24 Jan 2023 15:02:54 -0800

    This reverts commit 972fa3a.

    Kmemleak operates by periodically scanning memory regions for pointers to
    allocated memory blocks to determine if they are leaked or not.  However,
    reserved memory regions can be used for DMA transactions between a device
    and a CPU, and thus, wouldn't contain pointers to allocated memory blocks,
    making them inappropriate for kmemleak to scan.  Thus, revert this commit.

    Link: https://lkml.kernel.org/r/20230124230254.295589-1-isaacmanjarres@google.com
    Fixes: 972fa3a ("mm: kmemleak: alloc gray object for reserved region with direct map")
    Signed-off-by: Isaac J. Manjarres <isaacmanjarres@google.com>
    Acked-by: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Calvin Zhang <calvinzhang.cool@gmail.com>
    Cc: Frank Rowand <frowand.list@gmail.com>
    Cc: Rob Herring <robh+dt@kernel.org>
    Cc: Saravana Kannan <saravanak@google.com>
    Cc: <stable@vger.kernel.org>	[5.17+]
    Signed-off-by: Andrew Morton <akpm@linux-foundation.org>

Signed-off-by: Luiz Capitulino <luizcap@redhat.com>

Author: luiz-cap

drivers/of/fdt.c

@@ -26,7 +26,6 @@
 #include <linux/serial_core.h>
 #include <linux/sysfs.h>
 #include <linux/random.h>
-#include <linux/kmemleak.h>
 
 #include <asm/setup.h>  /* for COMMAND_LINE_SIZE */
 #include <asm/page.h>
@@ -525,12 +524,9 @@ static int __init __reserved_mem_reserve_reg(unsigned long node,
 		size = dt_mem_next_cell(dt_root_size_cells, &prop);
 
 		if (size &&
-		    early_init_dt_reserve_memory_arch(base, size, nomap) == 0) {
+		    early_init_dt_reserve_memory_arch(base, size, nomap) == 0)
 			pr_debug("Reserved memory: reserved region for node '%s': base %pa, size %lu MiB\n",
 				uname, &base, (unsigned long)(size / SZ_1M));
-			if (!nomap)
-				kmemleak_alloc_phys(base, size, 0);
-		}
 		else
 			pr_info("Reserved memory: failed to reserve memory for node '%s': base %pa, size %lu MiB\n",
 				uname, &base, (unsigned long)(size / SZ_1M));