From affa219b60a11b3295637a97f5b1b8ef231490fc Mon Sep 17 00:00:00 2001 From: Joe Korty Date: Wed, 3 Dec 2008 18:58:19 -0500 Subject: [PATCH] x86: change thread_info's flag field back to 32 bits Impact: pack struct thread_info more tightly Change x86_64's thread_info 'flags' field back to __u32. This was changed to 'unsigned long' when the thread_info*.h for i386 and x86_64 were merged. Change it back. We can do this as only 27 bits of 'flags' are actually used. This change actually packs down thread_info by 64 bits: 32 bits are saved by the smaller flags, and 32 bits are saved by the following 'mm_segment_t field' becoming naturally 64-bit aligned. Signed-off-by: Joe Korty Signed-off-by: Ingo Molnar --- arch/x86/include/asm/thread_info.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/arch/x86/include/asm/thread_info.h b/arch/x86/include/asm/thread_info.h index e44d379faad2..8dbc57390d25 100644 --- a/arch/x86/include/asm/thread_info.h +++ b/arch/x86/include/asm/thread_info.h @@ -24,7 +24,7 @@ struct exec_domain; struct thread_info { struct task_struct *task; /* main task structure */ struct exec_domain *exec_domain; /* execution domain */ - unsigned long flags; /* low level flags */ + __u32 flags; /* low level flags */ __u32 status; /* thread synchronous flags */ __u32 cpu; /* current CPU */ int preempt_count; /* 0 => preemptable, -- 2.20.1