microblaze: simplify pte_alloc_one_kernel()

The microblaze's implementation of pte_alloc_one_kernel() used
memblock_alloc_try_nid_raw() along with clear_page() to allocated a zeroed
page during early setup.

Replace calls of these functions with a call to memblock_alloc_try_nid()
that already returns zeroed page and respects the same allocation limits
as memblock_alloc_try_nid_raw().

While on it drop early_get_page() wrapper that was only used in
pte_alloc_one_kernel().

Link: https://lkml.kernel.org/r/20210714123739.16493-3-rppt@kernel.org
Signed-off-by: Mike Rapoport <rppt@linux.ibm.com>
Reviewed-by: David Hildenbrand <david@redhat.com>
Cc: Michal Simek <monstr@monstr.eu>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

diff --git a/arch/microblaze/include/asm/pgtable.h b/arch/microblaze/include/asm/pgtable.h
index 71cd547..c136a01 100644 (file)
--- a/arch/microblaze/include/asm/pgtable.h
+++ b/arch/microblaze/include/asm/pgtable.h
@@ -443,8 +443,6 @@ extern int mem_init_done;
 
 asmlinkage void __init mmu_init(void);
 
-void __init *early_get_page(void);
-
 #endif /* __ASSEMBLY__ */
 #endif /* __KERNEL__ */
 

diff --git a/arch/microblaze/mm/init.c b/arch/microblaze/mm/init.c
index ab55c70..952f35b 100644 (file)
--- a/arch/microblaze/mm/init.c
+++ b/arch/microblaze/mm/init.c
@@ -265,18 +265,6 @@ asmlinkage void __init mmu_init(void)
        dma_contiguous_reserve(memory_start + lowmem_size - 1);
 }
 
-/* This is only called until mem_init is done. */
-void __init *early_get_page(void)
-{
-       /*
-        * Mem start + kernel_tlb -> here is limit
-        * because of mem mapping from head.S
-        */
-       return memblock_alloc_try_nid_raw(PAGE_SIZE, PAGE_SIZE,
-                               MEMBLOCK_LOW_LIMIT, memory_start + kernel_tlb,
-                               NUMA_NO_NODE);
-}
-
 void * __ref zalloc_maybe_bootmem(size_t size, gfp_t mask)
 {
        void *p;

diff --git a/arch/microblaze/mm/pgtable.c b/arch/microblaze/mm/pgtable.c
index 38ccb90..c1833b1 100644 (file)
--- a/arch/microblaze/mm/pgtable.c
+++ b/arch/microblaze/mm/pgtable.c
@@ -33,6 +33,7 @@
 #include <linux/init.h>
 #include <linux/mm_types.h>
 #include <linux/pgtable.h>
+#include <linux/memblock.h>
 
 #include <asm/pgalloc.h>
 #include <linux/io.h>
@@ -242,15 +243,13 @@ unsigned long iopa(unsigned long addr)
 
 __ref pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
 {
-       pte_t *pte;
-       if (mem_init_done) {
-               pte = (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
-       } else {
-               pte = (pte_t *)early_get_page();
-               if (pte)
-                       clear_page(pte);
-       }
-       return pte;
+       if (mem_init_done)
+               return (pte_t *)__get_free_page(GFP_KERNEL | __GFP_ZERO);
+       else
+               return memblock_alloc_try_nid(PAGE_SIZE, PAGE_SIZE,
+                                             MEMBLOCK_LOW_LIMIT,
+                                             memory_start + kernel_tlb,
+                                             NUMA_NO_NODE);
 }
 
 void __set_fixmap(enum fixed_addresses idx, phys_addr_t phys, pgprot_t flags)