Commit f2bb8693 authored by Christophe Leroy's avatar Christophe Leroy Committed by Michael Ellerman
Browse files

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: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
Link: https://lore.kernel.org/r/41c99bc06394a6bc2888631cb98a3ed2ae281ddb.1568295907.git.christophe.leroy@c-s.fr
parent bf9c95e2

arch/powerpc/mm/mem.c

+0 −8
Original line number Diff line number Diff line
@@ -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);

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