x86: change thread_info's flag field back to 32 bits
authorJoe Korty <joe.korty@ccur.com>
Wed, 3 Dec 2008 23:58:19 +0000 (18:58 -0500)
committerIngo Molnar <mingo@elte.hu>
Thu, 4 Dec 2008 10:06:03 +0000 (11:06 +0100)
commitaffa219b60a11b3295637a97f5b1b8ef231490fc
tree410004998119ec6066a3585a1b97f028d8d4d8a3
parentc0515566f3117c44b0572559bcc3cb00899b0910
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 <joe.korty@ccur.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
arch/x86/include/asm/thread_info.h