Messages in this thread Patch in this message | | | From | Andy Lutomirski <> | Subject | [PATCH 2/9] x86, perf: Fix incorrect TIF_IA32 check in code_segment_base | Date | Wed, 18 Mar 2015 18:33:28 -0700 |
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We're want to check whether user code is in 32-bit mode, not whether the task is nominally 32-bit.
Signed-off-by: Andy Lutomirski <luto@kernel.org> --- arch/x86/kernel/cpu/perf_event.c | 7 +++---- 1 file changed, 3 insertions(+), 4 deletions(-)
diff --git a/arch/x86/kernel/cpu/perf_event.c b/arch/x86/kernel/cpu/perf_event.c index b71a7f86d68a..979963bb3977 100644 --- a/arch/x86/kernel/cpu/perf_event.c +++ b/arch/x86/kernel/cpu/perf_event.c @@ -2161,10 +2161,9 @@ static unsigned long code_segment_base(struct pt_regs *regs) if (user_mode(regs) && regs->cs != __USER_CS) return get_segment_base(regs->cs); #else - if (test_thread_flag(TIF_IA32)) { - if (user_mode(regs) && regs->cs != __USER32_CS) - return get_segment_base(regs->cs); - } + if (user_mode(regs) && !user_64bit_mode(regs) && + regs->cs != __USER32_CS) + return get_segment_base(regs->cs); #endif return 0; } -- 2.3.0
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