[PATCH] c6x: switch to NO_BOOTMEM

Mike Rapoport
2018-06-27T12:09:32Z

The c6x is already using memblock and does most of early memory
reservations with it, so it was only a matter of removing the bootmem
initialization and handover of the memory from memblock to bootmem.

Signed-off-by: Mike Rapoport <rppt@linux.vnet.ibm.com>
---
arch/c6x/Kconfig | 1 +
arch/c6x/kernel/setup.c | 26 +-------------------------
2 files changed, 2 insertions(+), 25 deletions(-)

diff --git a/arch/c6x/Kconfig b/arch/c6x/Kconfig
index bf59855628ac..054c7c963180 100644
--- a/arch/c6x/Kconfig
+++ b/arch/c6x/Kconfig
@@ -14,6 +14,7 @@ config C6X
select GENERIC_IRQ_SHOW
select HAVE_ARCH_TRACEHOOK
select HAVE_MEMBLOCK
+ select NO_BOOTMEM
select SPARSE_IRQ
select IRQ_DOMAIN
select OF
diff --git a/arch/c6x/kernel/setup.c b/arch/c6x/kernel/setup.c
index 786e36e2f61d..cc74cb9d349b 100644
--- a/arch/c6x/kernel/setup.c
+++ b/arch/c6x/kernel/setup.c
@@ -296,7 +296,6 @@ notrace void __init machine_init(unsigned long dt_ptr)

void __init setup_arch(char **cmdline_p)
{
- int bootmap_size;
struct memblock_region *reg;

printk(KERN_INFO "Initializing kernel\n");
@@ -353,16 +352,6 @@ void __init setup_arch(char **cmdline_p)
init_mm.end_data = memory_start;
init_mm.brk = memory_start;

- /*
- * Give all the memory to the bootmap allocator, tell it to put the
- * boot mem_map at the start of memory
- */
- bootmap_size = init_bootmem_node(NODE_DATA(0),
- memory_start >> PAGE_SHIFT,
- PAGE_OFFSET >> PAGE_SHIFT,
- memory_end >> PAGE_SHIFT);
- memblock_reserve(memory_start, bootmap_size);
-
unflatten_device_tree();

c6x_cache_init();
@@ -397,22 +386,9 @@ void __init setup_arch(char **cmdline_p)
/* Initialize the coherent memory allocator */
coherent_mem_init(dma_start, dma_size);

- /*
- * Free all memory as a starting point.
- */
- free_bootmem(PAGE_OFFSET, memory_end - PAGE_OFFSET);
-
- /*
- * Then reserve memory which is already being used.
- */
- for_each_memblock(reserved, reg) {
- pr_debug("reserved - 0x%08x-0x%08x\n",
- (u32) reg->base, (u32) reg->size);
- reserve_bootmem(reg->base, reg->size, BOOTMEM_DEFAULT);
- }
-
max_low_pfn = PFN_DOWN(memory_end);
min_low_pfn = PFN_UP(memory_start);
+ max_pfn = max_low_pfn;
max_mapnr = max_low_pfn - min_low_pfn;

/* Get kmalloc into gear */
--
2.7.4