This patch fixes a bug in e820_update_range(): Previously, if a region was partially covered, then e820_update_range() only added a new E820 range but didn't update the end/size of the previous range. That lead to duplicate covering of a region. Patch tested on i386 and x86-64 with patch that uses e820_update_range() to limit the E820 map when "mem" parameter is specified on the command line. Signed-off-by: Bernhard Walle <bwalle at suse.de> --- arch/x86/kernel/e820.c | 1 + 1 files changed, 1 insertions(+), 0 deletions(-) diff --git a/arch/x86/kernel/e820.c b/arch/x86/kernel/e820.c index e285ea3..e466073 100644 --- a/arch/x86/kernel/e820.c +++ b/arch/x86/kernel/e820.c @@ -422,6 +422,7 @@ u64 __init e820_update_range(u64 start, u64 size, unsigned old_type, final_end = min(start + size, ei->addr + ei->size); if (final_start >= final_end) continue; + ei->size -= final_end - final_start; e820_add_region(final_start, final_end - final_start, new_type); real_updated_size += final_end - final_start; -- 1.5.4.5
