From 4ec8fd037139a4d8afb2a5c7edb4a17f9449a035 Mon Sep 17 00:00:00 2001 From: Jacob Pan Date: Tue, 23 Apr 2024 10:41:04 -0700 Subject: [PATCH] x86/irq: Unionize PID.PIR for 64bit access w/o casting Make the PIR field into u64 such that atomic xchg64 can be used without ugly casting. Suggested-by: Thomas Gleixner Signed-off-by: Jacob Pan Signed-off-by: Thomas Gleixner Link: https://lore.kernel.org/r/20240423174114.526704-3-jacob.jun.pan@linux.intel.com --- arch/x86/include/asm/posted_intr.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) 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 */ -- 2.50.1