powerpc/fixmap: don't clear fixmap area in paging_init()

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@c-s.fr>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/41c99bc06394a6bc2888631cb98a3ed2ae281ddb.1568295907.git.christophe.leroy@c-s.fr

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index 7573002..bf0c54b 100644 (file)
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -237,14 +237,6 @@ 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);