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| author | Peter Zijlstra <peterz@infradead.org> | 2011-08-24 15:32:31 +0200 |
|---|---|---|
| committer | Michal Simek <monstr@monstr.eu> | 2011-10-14 12:28:42 +0200 |
| commit | 84ac218f0257a0cfd7689d9a44f53118dbf307b3 (patch) | |
| tree | 015d3fc9489fbb00da12dbf4eee72752f3307b9e /arch/microblaze | |
| parent | microblaze: Use delay slot in __strnlen_user, __strncpy_user (diff) | |
| download | linux-84ac218f0257a0cfd7689d9a44f53118dbf307b3.tar.xz linux-84ac218f0257a0cfd7689d9a44f53118dbf307b3.zip | |
microblaze: Remove __ARCH_WANT_INTERRUPTS_ON_CTXSW usage
As far as I can tell the only reason microblaze has
__ARCH_WANT_INTERRUPTS_ON_CTXSW is because it initializes new task state
with interrupts enabled so that on switch_to() interrupts get enabled.
So change copy_thread() to clear MSR_IE instead of set it, this will
ensure switch_to() will always keep IRQs disabled.
The scheduler will disable IRQs when taking rq->lock in schedule() and
enable IRQs in finish_lock_switch() after its done its magic.
This leaves ARM the only __ARCH_WANT_INTERRUPTS_ON_CTXSW user.
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
Signed-off-by: Michal Simek <monstr@monstr.eu>
Diffstat (limited to 'arch/microblaze')
| -rw-r--r-- | arch/microblaze/include/asm/system.h | 2 | ||||
| -rw-r--r-- | arch/microblaze/kernel/process.c | 1 |
2 files changed, 1 insertions, 2 deletions
diff --git a/arch/microblaze/include/asm/system.h b/arch/microblaze/include/asm/system.h index 0953d1425d5b..5a433cbaafb3 100644 --- a/arch/microblaze/include/asm/system.h +++ b/arch/microblaze/include/asm/system.h @@ -17,8 +17,6 @@ #include <asm-generic/cmpxchg.h> #include <asm-generic/cmpxchg-local.h> -#define __ARCH_WANT_INTERRUPTS_ON_CTXSW - struct task_struct; struct thread_info; diff --git a/arch/microblaze/kernel/process.c b/arch/microblaze/kernel/process.c index dbb812421d8a..95cc295976a7 100644 --- a/arch/microblaze/kernel/process.c +++ b/arch/microblaze/kernel/process.c @@ -179,6 +179,7 @@ int copy_thread(unsigned long clone_flags, unsigned long usp, ti->cpu_context.msr = (childregs->msr|MSR_VM); ti->cpu_context.msr &= ~MSR_UMS; /* switch_to to kernel mode */ + ti->cpu_context.msr &= ~MSR_IE; #endif ti->cpu_context.r15 = (unsigned long)ret_from_fork - 8; |