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authorDavid Howells <dhowells@redhat.com>2010-10-27 17:29:01 +0100
committerDavid Howells <dhowells@redhat.com>2010-10-27 17:29:01 +0100
commit7c7fcf762e405eb040ee10d22d656a791f616122 (patch)
tree2ec4f320fe2d348ffbdab6aebc9a36bcbf13da34 /arch/mn10300/kernel/switch_to.S
parenta5e03ca2fd57a5823b759981bff8d19b46ddad4d (diff)
downloadlinux-7c7fcf762e405eb040ee10d22d656a791f616122.tar.bz2
MN10300: Save frame pointer in thread_info struct rather than global var
Save the current exception frame pointer in the thread_info struct rather than in a global variable as the latter makes SMP tricky, especially when preemption is also enabled. This also replaces __frame with current_frame() and rearranges header file inclusions to make it all compile. Signed-off-by: David Howells <dhowells@redhat.com> Acked-by: Akira Takeuchi <takeuchi.akr@jp.panasonic.com>
Diffstat (limited to 'arch/mn10300/kernel/switch_to.S')
-rw-r--r--arch/mn10300/kernel/switch_to.S18
1 files changed, 0 insertions, 18 deletions
diff --git a/arch/mn10300/kernel/switch_to.S b/arch/mn10300/kernel/switch_to.S
index b08cb2e3aebd..9074d0fb8788 100644
--- a/arch/mn10300/kernel/switch_to.S
+++ b/arch/mn10300/kernel/switch_to.S
@@ -38,15 +38,6 @@ ENTRY(__switch_to)
mov d1,a1
# save prev context
-#ifdef CONFIG_SMP
- mov (CPUID),a2
- add a2,a2
- add a2,a2
- mov (___frame,a2),d0
-#else /* CONFIG_SMP */
- mov (__frame),d0
-#endif /* CONFIG_SMP */
- mov d0,(THREAD_FRAME,a0)
mov __switch_back,d0
mov d0,(THREAD_PC,a0)
mov sp,a2
@@ -68,15 +59,6 @@ ENTRY(__switch_to)
mov a2,e2
#endif
- mov (THREAD_FRAME,a1),a2
-#ifdef CONFIG_SMP
- mov (CPUID),a0
- add a0,a0
- add a0,a0
- mov a2,(___frame,a0)
-#else /* CONFIG_SMP */
- mov a2,(__frame)
-#endif /* CONFIG_SMP */
mov (THREAD_PC,a1),a2
mov d2,d0 # for ret_from_fork
mov d0,a0 # for __switch_to