This is a note to let you know that I've just added the patch titled
microblaze: don't treat zero reserved memory regions as error
to the 4.19-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
microblaze-don-t-treat-zero-reserved-memory-regions-.patch
and it can be found in the queue-4.19 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dfc65ed8469bc167c0ddfc718a4d420864e516e0
Author: Mike Rapoport <rppt@xxxxxxxxxx>
Date: Mon Jul 29 08:33:27 2024 +0300
microblaze: don't treat zero reserved memory regions as error
[ Upstream commit 0075df288dd8a7abfe03b3766176c393063591dd ]
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@xxxxxxxxxxxx>
Signed-off-by: Mike Rapoport <rppt@xxxxxxxxxx>
Reviewed-by: Wei Yang <richard.weiyang@xxxxxxxxx>
Tested-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Link: https://lore.kernel.org/r/20240729053327.4091459-1-rppt@xxxxxxxxxx
Signed-off-by: Guenter Roeck <linux@xxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index df6de7ccdc2eb..ecad6d8b9154b 100644
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -289,11 +289,6 @@ 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);
