diff mbox series

[v2,02/13] x86/irq: Unionize PID.PIR for 64bit access w/o casting

Message ID 20240405223110.1609888-3-jacob.jun.pan@linux.intel.com (mailing list archive)
State New, archived
Headers show
Series Coalesced Interrupt Delivery with posted MSI | expand

Commit Message

Jacob Pan April 5, 2024, 10:30 p.m. UTC 
Make PIR field into u64 such that atomic xchg64 can be used without ugly
casting.

Suggested-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Jacob Pan <jacob.jun.pan@linux.intel.com>
---
 arch/x86/include/asm/posted_intr.h | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)
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Patch

diff --git a/arch/x86/include/asm/posted_intr.h b/arch/x86/include/asm/posted_intr.h
index f0324c56f7af..acf237b2882e 100644
--- a/arch/x86/include/asm/posted_intr.h
+++ b/arch/x86/include/asm/posted_intr.h
@@ -9,7 +9,10 @@ 
 
 /* Posted-Interrupt Descriptor */
 struct pi_desc {
-	u32 pir[8];     /* Posted interrupt requested */
+	union {
+		u32 pir[8];     /* Posted interrupt requested */
+		u64 pir64[4];
+	};
 	union {
 		struct {
 				/* bit 256 - Outstanding Notification */