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x86/asm/32: Remove a bunch of '& 0xffff' from pt_regs segment reads

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Now that pt_regs properly defines segment fields as 16-bit on 32-bit
CPUs, there's no need to mask off the high word.

Signed-off-by: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Borislav Petkov <bpetkov@suse.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
This commit is contained in:
Andy Lutomirski
2017-07-28 06:00:32 -07:00
committed by Ingo Molnar
parent 630c1863bc
commit 99504819fc
8 changed files with 12 additions and 13 deletions
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2
arch/x86/kernel/step.c
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@@ -13,7 +13,7 @@ unsigned long convert_ip_to_linear(struct task_struct *child, struct pt_regs *re
unsigned long addr, seg;
addr = regs->ip;
seg = regs->cs & 0xffff;
seg = regs->cs;
if (v8086_mode(regs)) {
addr = (addr & 0xffff) + (seg << 4);
return addr;