[Xen-changelog] [xen staging] AMD/IOMMU: initialize IRQ tasklet only once

[patchbot@xxxxxxx]

commit 587c39e552fbbdfa4ca64c703ad9df7191a76e8e
Author:     Jan Beulich <jbeulich@xxxxxxxx>
AuthorDate: Fri Jun 21 17:16:52 2019 +0200
Commit:     Jan Beulich <jbeulich@xxxxxxxx>
CommitDate: Fri Jun 21 17:16:52 2019 +0200

    AMD/IOMMU: initialize IRQ tasklet only once
    
    Don't do this once per IOMMU, nor after setting up the IOMMU interrupt
    (which will want to schedule this tasklet). In fact it can be
    initialized at build time.
    
    Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
    Acked-by: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
    Acked-by: Brian Woods <brian.woods@xxxxxxx>
---
 xen/drivers/passthrough/amd/iommu_init.c | 5 ++---
 1 file changed, 2 insertions(+), 3 deletions(-)

diff --git a/xen/drivers/passthrough/amd/iommu_init.c 
b/xen/drivers/passthrough/amd/iommu_init.c
index 72ea8824b0..5913277e52 100644
--- a/xen/drivers/passthrough/amd/iommu_init.c
+++ b/xen/drivers/passthrough/amd/iommu_init.c
@@ -31,7 +31,8 @@
 
 static int __initdata nr_amd_iommus;
 
-static struct tasklet amd_iommu_irq_tasklet;
+static void do_amd_iommu_irq(unsigned long data);
+static DECLARE_SOFTIRQ_TASKLET(amd_iommu_irq_tasklet, do_amd_iommu_irq, 0);
 
 unsigned int __read_mostly ivrs_bdf_entries;
 u8 __read_mostly ivhd_type;
@@ -1056,8 +1057,6 @@ static int __init amd_iommu_init_one(struct amd_iommu 
*iommu)
     printk("AMD-Vi: IOMMU %d Enabled.\n", nr_amd_iommus );
     nr_amd_iommus++;
 
-    softirq_tasklet_init(&amd_iommu_irq_tasklet, do_amd_iommu_irq, 0);
-
     return 0;
 
 error_out:
--
generated by git-patchbot for /home/xen/git/xen.git#staging

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