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| author | Ingo Molnar <mingo@kernel.org> | 2016-04-23 14:12:10 +0200 |
|---|---|---|
| committer | Ingo Molnar <mingo@kernel.org> | 2016-04-23 14:12:10 +0200 |
| commit | 65cbbd037b3d7be0a40bbdb5da9d43b0fccf17ee (patch) | |
| tree | 02b22c99008630010f28f45f502f55915f1014c2 /drivers/lguest/interrupts_and_traps.c | |
| parent | 9243ae5b28d02dc7d71a4f00c981ef6feaede3f1 (diff) | |
| parent | b303e7c15d53cd8ef6b349b702e07eee3f102792 (diff) | |
| download | talos-op-linux-65cbbd037b3d7be0a40bbdb5da9d43b0fccf17ee.tar.gz talos-op-linux-65cbbd037b3d7be0a40bbdb5da9d43b0fccf17ee.zip | |
Merge branch 'perf/urgent' into perf/core, to resolve conflict
Signed-off-by: Ingo Molnar <mingo@kernel.org>
Diffstat (limited to 'drivers/lguest/interrupts_and_traps.c')
| -rw-r--r-- | drivers/lguest/interrupts_and_traps.c | 6 |
1 files changed, 5 insertions, 1 deletions
diff --git a/drivers/lguest/interrupts_and_traps.c b/drivers/lguest/interrupts_and_traps.c index eb934b0242e0..67392b6ab845 100644 --- a/drivers/lguest/interrupts_and_traps.c +++ b/drivers/lguest/interrupts_and_traps.c @@ -331,7 +331,7 @@ void set_interrupt(struct lg_cpu *cpu, unsigned int irq) * Actually now I think of it, it's possible that Ron *is* half the Plan 9 * userbase. Oh well. */ -static bool could_be_syscall(unsigned int num) +bool could_be_syscall(unsigned int num) { /* Normal Linux IA32_SYSCALL_VECTOR or reserved vector? */ return num == IA32_SYSCALL_VECTOR || num == syscall_vector; @@ -416,6 +416,10 @@ bool deliver_trap(struct lg_cpu *cpu, unsigned int num) * * This routine indicates if a particular trap number could be delivered * directly. + * + * Unfortunately, Linux 4.6 started using an interrupt gate instead of a + * trap gate for syscalls, so this trick is ineffective. See Mastery for + * how we could do this anyway... */ static bool direct_trap(unsigned int num) { |
