[PATCH v1 1/4] powerpc/fixmap: don't clear fixmap area in paging_init()

From: Christophe Leroy
Date: Thu Sep 12 2019 - 09:49:46 EST


fixmap is intended to map things permanently like the IMMR region on
FSL SOC (8xx, 83xx, ...), so don't clear it when initialising paging()

Signed-off-by: Christophe Leroy <christophe.leroy@xxxxxx>
---
arch/powerpc/mm/mem.c | 8 --------
1 file changed, 8 deletions(-)

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index be941d382c8d..278be4712e10 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -216,14 +216,6 @@ void __init paging_init(void)
unsigned long long total_ram = memblock_phys_mem_size();
phys_addr_t top_of_ram = memblock_end_of_DRAM();

-#ifdef CONFIG_PPC32
- unsigned long v = __fix_to_virt(__end_of_fixed_addresses - 1);
- unsigned long end = __fix_to_virt(FIX_HOLE);
-
- for (; v < end; v += PAGE_SIZE)
- map_kernel_page(v, 0, __pgprot(0)); /* XXX gross */
-#endif
-
#ifdef CONFIG_HIGHMEM
map_kernel_page(PKMAP_BASE, 0, __pgprot(0)); /* XXX gross */
pkmap_page_table = virt_to_kpte(PKMAP_BASE);
--
2.13.3