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authorH. Peter Anvin <hpa@linux.intel.com>2010-12-16 19:11:09 -0800
committerH. Peter Anvin <hpa@linux.intel.com>2010-12-16 19:11:09 -0800
commit147dd5610c8d1bacb88a6c1dfdaceaf257946ed0 (patch)
tree7c803d44985e61879018dd76db52f77922e1b772 /arch/x86/boot
parent7f99d946e71e71d484b7543b49e990508e70d0c0 (diff)
x86-32: Make sure we can map all of lowmem if we need to
A relocatable kernel can be anywhere in lowmem -- and in the case of a kdump kernel, is likely to be fairly high. Since the early page tables map everything from address zero up we need to make sure we allocate enough brk that we can map all of lowmem if we need to. Reported-by: Stanislaw Gruszka <sgruszka@redhat.com> Signed-off-by: H. Peter Anvin <hpa@linux.intel.com> Tested-by: Yinghai Lu <yinghai@kernel.org> LKML-Reference: <4D0AD3ED.8070607@kernel.org>
Diffstat (limited to 'arch/x86/boot')
-rw-r--r--arch/x86/boot/compressed/misc.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/arch/x86/boot/compressed/misc.c b/arch/x86/boot/compressed/misc.c
index 23f315c9f215..325c05294fc4 100644
--- a/arch/x86/boot/compressed/misc.c
+++ b/arch/x86/boot/compressed/misc.c
@@ -355,7 +355,7 @@ asmlinkage void decompress_kernel(void *rmode, memptr heap,
if (heap > 0x3fffffffffffUL)
error("Destination address too large");
#else
- if (heap > ((-__PAGE_OFFSET-(512<<20)-1) & 0x7fffffff))
+ if (heap > ((-__PAGE_OFFSET-(128<<20)-1) & 0x7fffffff))
error("Destination address too large");
#endif
#ifndef CONFIG_RELOCATABLE