microblaze: don't treat zero reserved memory regions as error

Before commit 721f4a6526da ("mm/memblock: remove empty dummy entry") the
check for non-zero of memblock.reserved.cnt in mmu_init() would always
be true either because  memblock.reserved.cnt is initialized to 1 or
because there were memory reservations earlier.

The removal of dummy empty entry in memblock caused this check to fail
because now memblock.reserved.cnt is initialized to 0.

Remove the check for non-zero of memblock.reserved.cnt because it's
perfectly fine to have an empty memblock.reserved array that early in
boot.

Reported-by: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Mike Rapoport <rppt@kernel.org>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Tested-by: Guenter Roeck <linux@roeck-us.net>
Link: https://lore.kernel.org/r/20240729053327.4091459-1-rppt@kernel.org
Signed-off-by: Guenter Roeck <linux@roeck-us.net>

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index 3827dc76edd8236ce40ff6f0664bbf4725a9173f..4520c57415797fa729107799b13d7f3fee866095 100644 (file)
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -193,11 +193,6 @@ asmlinkage void __init mmu_init(void)
 {
        unsigned int kstart, ksize;
 
-       if (!memblock.reserved.cnt) {
-               pr_emerg("Error memory count\n");
-               machine_restart(NULL);
-       }
-
        if ((u32) memblock.memory.regions[0].size < 0x400000) {
                pr_emerg("Memory must be greater than 4MB\n");
                machine_restart(NULL);