Commit-ID: cd2f6a5a4704a359635eb34919317052e6a96ba7 Gitweb: http://git.kernel.org/tip/cd2f6a5a4704a359635eb34919317052e6a96ba7 Author: Toshi Kani <toshi.kani@xxxxxx> AuthorDate: Mon, 11 May 2015 10:15:52 +0200 Committer: Ingo Molnar <mingo@xxxxxxxxxx> CommitDate: Mon, 11 May 2015 10:38:44 +0200 x86/mm/mtrr: Remove incorrect address check in __mtrr_type_lookup() __mtrr_type_lookup() checks MTRR fixed ranges when mtrr_state.have_fixed is set and start is less than 0x100000. However, the 'else if (start < 0x1000000)' in the code checks with an incorrect address as it has an extra-zero in the address. The code still runs correctly as this check is meaningless, though. This patch replaces the incorrect address check with 'else' with no condition. Signed-off-by: Toshi Kani <toshi.kani@xxxxxx> Signed-off-by: Borislav Petkov <bp@xxxxxxx> Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> Cc: Andy Lutomirski <luto@xxxxxxxxxxxxxx> Cc: Borislav Petkov <bp@xxxxxxxxx> Cc: Brian Gerst <brgerst@xxxxxxxxx> Cc: Denys Vlasenko <dvlasenk@xxxxxxxxxx> Cc: Elliott@xxxxxx Cc: H. Peter Anvin <hpa@xxxxxxxxx> Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx> Cc: Luis R. Rodriguez <mcgrof@xxxxxxxx> Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx> Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx> Cc: dave.hansen@xxxxxxxxx Cc: linux-mm <linux-mm@xxxxxxxxx> Cc: pebolle@xxxxxxxxxx Link: http://lkml.kernel.org/r/1427234921-19737-4-git-send-email-toshi.kani@xxxxxx Link: http://lkml.kernel.org/r/1431332153-18566-8-git-send-email-bp@xxxxxxxxx Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx> --- arch/x86/kernel/cpu/mtrr/generic.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/kernel/cpu/mtrr/generic.c b/arch/x86/kernel/cpu/mtrr/generic.c index 7d74f7b..5b23967 100644 --- a/arch/x86/kernel/cpu/mtrr/generic.c +++ b/arch/x86/kernel/cpu/mtrr/generic.c @@ -137,7 +137,7 @@ static u8 __mtrr_type_lookup(u64 start, u64 end, u64 *partial_end, int *repeat) idx = 1 * 8; idx += ((start - 0x80000) >> 14); return mtrr_state.fixed_ranges[idx]; - } else if (start < 0x1000000) { + } else { idx = 3 * 8; idx += ((start - 0xC0000) >> 12); return mtrr_state.fixed_ranges[idx]; -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>