um: Fix to call read_initrd after init_bootmem

commit 5b4236e17cc1bd9fa14b2b0c7a4ae632d41f2e20 upstream.

Since read_initrd() invokes alloc_bootmem() for allocating
memory to load initrd image, it must be called after init_bootmem.

This makes read_initrd() called directly from setup_arch()
after init_bootmem() and mem_total_pages().

Fixes: b63236972e1 ("um: Setup physical memory in setup_arch()")
Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Richard Weinberger <richard@nod.at>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

2 files changed, 7 insertions, 3 deletions

diff --git a/arch/um/kernel/initrd.c b/arch/um/kernel/initrd.c
index 48bae81f8dca..6f6e7896e53f 100644
--- a/arch/um/kernel/initrd.c
+++ b/arch/um/kernel/initrd.c
@@ -14,7 +14,7 @@
 static char *initrd __initdata = NULL;
 static int load_initrd(char *filename, void *buf, int size);
 
-static int __init read_initrd(void)
+int __init read_initrd(void)
 {
         void *area;
         long long size;
@@ -46,8 +46,6 @@ static int __init read_initrd(void)
         return 0;
 }
 
-__uml_postsetup(read_initrd);
-
 static int __init uml_initrd_setup(char *line, int *add)
 {
         initrd = line;
diff --git a/arch/um/kernel/um_arch.c b/arch/um/kernel/um_arch.c
index e8175a8aa22c..26b47deca2a0 100644
--- a/arch/um/kernel/um_arch.c
+++ b/arch/um/kernel/um_arch.c
@@ -336,11 +336,17 @@ int __init linux_main(int argc, char **argv)
         return start_uml();
 }
 
+int __init __weak read_initrd(void)
+{
+        return 0;
+}
+
 void __init setup_arch(char **cmdline_p)
 {
         stack_protections((unsigned long) &init_thread_info);
         setup_physmem(uml_physmem, uml_reserved, physmem_size, highmem);
         mem_total_pages(physmem_size, iomem_size, highmem);
+        read_initrd();
 
         paging_init();
         strlcpy(boot_command_line, command_line, COMMAND_LINE_SIZE);