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| author | Thomas Gleixner <tglx@linutronix.de> | 2020-02-26 01:16:17 +0300 |
|---|---|---|
| committer | Thomas Gleixner <tglx@linutronix.de> | 2020-06-11 16:14:46 +0300 |
| commit | 58d9c81facf55dbd1836d114ce360a048e3a0582 (patch) | |
| tree | dd93123aa7cd63b75226d0353235099b3c4be8bc /arch/x86/kernel/traps.c | |
| parent | 4b6b9111c0b9aa4c3b319f1c5a3b1d5850792167 (diff) | |
| download | linux-58d9c81facf55dbd1836d114ce360a048e3a0582.tar.xz | |
x86/entry: Convert Bounds exception to IDTENTRY
Convert #BR to IDTENTRY:
- Implement the C entry point with DEFINE_IDTENTRY
- Emit the ASM stub with DECLARE_IDTENTRY
- Remove the ASM idtentry in 64bit
- Remove the open coded ASM entry code in 32bit
- Fixup the XEN/PV code
- Remove the old prototypes
- Remove the RCU warning as the new entry macro ensures correctness
No functional change.
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com>
Acked-by: Andy Lutomirski <luto@kernel.org>
Acked-by: Peter Zijlstra <peterz@infradead.org>
Link: https://lkml.kernel.org/r/20200505134904.863001309@linutronix.de
Diffstat (limited to 'arch/x86/kernel/traps.c')
| -rw-r--r-- | arch/x86/kernel/traps.c | 9 |
1 files changed, 4 insertions, 5 deletions
diff --git a/arch/x86/kernel/traps.c b/arch/x86/kernel/traps.c index b522e2aa9e9a..7a9fb8b9e1a8 100644 --- a/arch/x86/kernel/traps.c +++ b/arch/x86/kernel/traps.c @@ -410,18 +410,17 @@ dotraplinkage void do_double_fault(struct pt_regs *regs, long error_code, unsign panic("Machine halted."); } -dotraplinkage void do_bounds(struct pt_regs *regs, long error_code) +DEFINE_IDTENTRY(exc_bounds) { - RCU_LOCKDEP_WARN(!rcu_is_watching(), "entry code didn't wake RCU"); - if (notify_die(DIE_TRAP, "bounds", regs, error_code, + if (notify_die(DIE_TRAP, "bounds", regs, 0, X86_TRAP_BR, SIGSEGV) == NOTIFY_STOP) return; cond_local_irq_enable(regs); if (!user_mode(regs)) - die("bounds", regs, error_code); + die("bounds", regs, 0); - do_trap(X86_TRAP_BR, SIGSEGV, "bounds", regs, error_code, 0, NULL); + do_trap(X86_TRAP_BR, SIGSEGV, "bounds", regs, 0, 0, NULL); cond_local_irq_disable(regs); } |