[PATCH v4 28/75] x86/idt: Split idt_data setup out of set_intr_gate()

[Joerg Roedel]

From: Joerg Roedel <jroe...@suse.de>

The code to setup idt_data is needed for early exception handling, but
set_intr_gate() can't be used that early because it has pv-ops in its
code path, which don't work that early.

Split out the idt_data initialization part from set_intr_gate() so
that it can be used separatly.

Signed-off-by: Joerg Roedel <jroe...@suse.de>
---
 arch/x86/kernel/idt.c | 22 ++++++++++++++--------
 1 file changed, 14 insertions(+), 8 deletions(-)

diff --git a/arch/x86/kernel/idt.c b/arch/x86/kernel/idt.c
index b920f2352df5..367eb6a593dd 100644
--- a/arch/x86/kernel/idt.c
+++ b/arch/x86/kernel/idt.c
@@ -205,18 +205,24 @@ idt_setup_from_table(gate_desc *idt, const struct 
idt_data *t, int size, bool sy
        }
 }
 
+static void init_idt_data(struct idt_data *data, unsigned int n,
+                         const void *addr)
+{
+       BUG_ON(n > 0xFF);
+
+       memset(data, 0, sizeof(*data));
+       data->vector    = n;
+       data->addr      = addr;
+       data->segment   = __KERNEL_CS;
+       data->bits.type = GATE_INTERRUPT;
+       data->bits.p    = 1;
+}
+
 static __init void set_intr_gate(unsigned int n, const void *addr)
 {
        struct idt_data data;
 
-       BUG_ON(n > 0xFF);
-
-       memset(&data, 0, sizeof(data));
-       data.vector     = n;
-       data.addr       = addr;
-       data.segment    = __KERNEL_CS;
-       data.bits.type  = GATE_INTERRUPT;
-       data.bits.p     = 1;
+       init_idt_data(&data, n, addr);
 
        idt_setup_from_table(idt_table, &data, 1, false);
 }
-- 
2.27.0