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authorH. Peter Anvin <hpa@linux.intel.com>2010-12-17 04:11:09 +0100
committerH. Peter Anvin <hpa@linux.intel.com>2010-12-17 04:11:09 +0100
commit147dd5610c8d1bacb88a6c1dfdaceaf257946ed0 (patch)
tree7c803d44985e61879018dd76db52f77922e1b772 /arch/x86/boot
parentx86, vt-d: Handle previous faults after enabling fault handling (diff)
downloadlinux-147dd5610c8d1bacb88a6c1dfdaceaf257946ed0.tar.xz
linux-147dd5610c8d1bacb88a6c1dfdaceaf257946ed0.zip
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