Commit 44eeb9b5 authored by Helge Deller's avatar Helge Deller
Browse files

parisc: Prevent ldil() to sign-extend into upper 32 bits 



Add some build time checks to prevent that the various usages of
	"ldil L%(TMPALIAS_MAP_START), %reg"
sign-extends into the upper 32 bits when building a 64-bit kernel.

Signed-off-by: default avatarHelge Deller <deller@gmx.de>
parent c64c782e

arch/parisc/mm/init.c

+6 −0
Original line number Diff line number Diff line
@@ -555,6 +555,12 @@ void __init mem_init(void) 
	BUILD_BUG_ON(PT_INITIAL > PTRS_PER_PGD);

#endif



#ifdef CONFIG_64BIT

	/* avoid ldil_%L() asm statements to sign-extend into upper 32-bits */

	BUILD_BUG_ON(__PAGE_OFFSET >= 0x80000000);

	BUILD_BUG_ON(TMPALIAS_MAP_START >= 0x80000000);

#endif



	high_memory = __va((max_pfn << PAGE_SHIFT));

	set_max_mapnr(max_low_pfn);

	memblock_free_all();