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authorMichael Cree <mcree@orcon.net.nz>2009-11-30 22:44:40 -0500
committerMatt Turner <mattst88@gmail.com>2009-11-30 22:44:40 -0500
commit745dd2405e281d96c0a449103bdf6a895048f28c (patch)
tree3cbcd71049b42e0f2933d7682886527beed4a4c3 /arch/alpha
parentcc9a2c8301683f73b7e0d1fc2cb5159110f3469f (diff)
Alpha: Rearrange thread info flags fixing two regressions
The removal of the TIF_NOTIFY_RESUME flag, commit a583f1b54249b "remove unused TIF_NOTIFY_RESUME flag," resulted in incorrect setting of the unaligned access control flags by the prctl syscall. The re-addition of the TIF_NOTIFY_RESUME flag, commit d0420c83f39f "KEYS: Extend TIF_NOTIFY_RESUME to (almost) all architectures [try #6]" further caused problems, namely incorrect operands to assembler code as evidenced by: AS arch/alpha/kernel/entry.o arch/alpha/kernel/entry.S: Assembler messages: arch/alpha/kernel/entry.S:326: Warning: operand out of range (0x0000000000000406 is not between 0x0000000000000000 and 0x00000000000000ff) Both regressions fixed by (1) rearranging TIF_NOTIFY_RESUME flag to be in lower 8 bits of the thread info flags, and (2) making sure that ALPHA_UAC_SHIFT matches the rearrangement of the thread info flags. Signed-off-by: Michael Cree <mcree@orcon.net.nz> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: David Howells <dhowells@redhat.com>, Signed-off-by: Matt Turner <mattst88@gmail.com>
Diffstat (limited to 'arch/alpha')
-rw-r--r--arch/alpha/include/asm/thread_info.h27
1 files changed, 15 insertions, 12 deletions
diff --git a/arch/alpha/include/asm/thread_info.h b/arch/alpha/include/asm/thread_info.h
index 815680b585ed..b3e888638bb7 100644
--- a/arch/alpha/include/asm/thread_info.h
+++ b/arch/alpha/include/asm/thread_info.h
@@ -61,21 +61,24 @@ register struct thread_info *__current_thread_info __asm__("$8");
61/* 61/*
62 * Thread information flags: 62 * Thread information flags:
63 * - these are process state flags and used from assembly 63 * - these are process state flags and used from assembly
64 * - pending work-to-be-done flags come first to fit in and immediate operand. 64 * - pending work-to-be-done flags come first and must be assigned to be
65 * within bits 0 to 7 to fit in and immediate operand.
66 * - ALPHA_UAC_SHIFT below must be kept consistent with the unaligned
67 * control flags.
65 * 68 *
66 * TIF_SYSCALL_TRACE is known to be 0 via blbs. 69 * TIF_SYSCALL_TRACE is known to be 0 via blbs.
67 */ 70 */
68#define TIF_SYSCALL_TRACE 0 /* syscall trace active */ 71#define TIF_SYSCALL_TRACE 0 /* syscall trace active */
69#define TIF_SIGPENDING 1 /* signal pending */ 72#define TIF_NOTIFY_RESUME 1 /* callback before returning to user */
70#define TIF_NEED_RESCHED 2 /* rescheduling necessary */ 73#define TIF_SIGPENDING 2 /* signal pending */
71#define TIF_POLLING_NRFLAG 3 /* poll_idle is polling NEED_RESCHED */ 74#define TIF_NEED_RESCHED 3 /* rescheduling necessary */
72#define TIF_DIE_IF_KERNEL 4 /* dik recursion lock */ 75#define TIF_POLLING_NRFLAG 8 /* poll_idle is polling NEED_RESCHED */
73#define TIF_UAC_NOPRINT 5 /* see sysinfo.h */ 76#define TIF_DIE_IF_KERNEL 9 /* dik recursion lock */
74#define TIF_UAC_NOFIX 6 77#define TIF_UAC_NOPRINT 10 /* see sysinfo.h */
75#define TIF_UAC_SIGBUS 7 78#define TIF_UAC_NOFIX 11
76#define TIF_MEMDIE 8 79#define TIF_UAC_SIGBUS 12
77#define TIF_RESTORE_SIGMASK 9 /* restore signal mask in do_signal */ 80#define TIF_MEMDIE 13
78#define TIF_NOTIFY_RESUME 10 /* callback before returning to user */ 81#define TIF_RESTORE_SIGMASK 14 /* restore signal mask in do_signal */
79#define TIF_FREEZE 16 /* is freezing for suspend */ 82#define TIF_FREEZE 16 /* is freezing for suspend */
80 83
81#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE) 84#define _TIF_SYSCALL_TRACE (1<<TIF_SYSCALL_TRACE)
@@ -94,7 +97,7 @@ register struct thread_info *__current_thread_info __asm__("$8");
94#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \ 97#define _TIF_ALLWORK_MASK (_TIF_WORK_MASK \
95 | _TIF_SYSCALL_TRACE) 98 | _TIF_SYSCALL_TRACE)
96 99
97#define ALPHA_UAC_SHIFT 6 100#define ALPHA_UAC_SHIFT 10
98#define ALPHA_UAC_MASK (1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \ 101#define ALPHA_UAC_MASK (1 << TIF_UAC_NOPRINT | 1 << TIF_UAC_NOFIX | \
99 1 << TIF_UAC_SIGBUS) 102 1 << TIF_UAC_SIGBUS)
100 103