From 84288ad89e9736c7478e138f247397b9ab7a9d28 Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Sun, 1 Jul 2007 12:06:48 -0700 Subject: [PATCH] i386: mtrr crash fix Commit 3ebad5905609476a4ff1151a66b21d9794009961 ("[PATCH] x86: Save and restore the fixed-range MTRRs of the BSP when suspending") added mtrr operations without verifying that the CPU has MTRRs. Crashes transmeta CPUs. Cc: "H. Peter Anvin" Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/i386/kernel/cpu/mtrr/generic.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) diff --git a/arch/i386/kernel/cpu/mtrr/generic.c b/arch/i386/kernel/cpu/mtrr/generic.c index 5a551fb7ea7b..f6e46943e6ef 100644 --- a/arch/i386/kernel/cpu/mtrr/generic.c +++ b/arch/i386/kernel/cpu/mtrr/generic.c @@ -65,7 +65,8 @@ get_fixed_ranges(mtrr_type * frs) void mtrr_save_fixed_ranges(void *info) { - get_fixed_ranges(mtrr_state.fixed_ranges); + if (cpu_has_mtrr) + get_fixed_ranges(mtrr_state.fixed_ranges); } static void print_fixed(unsigned base, unsigned step, const mtrr_type*types) -- GitLab