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| author | David Howells <dhowells@redhat.com> | 2010-10-27 17:29:01 +0100 |
|---|---|---|
| committer | David Howells <dhowells@redhat.com> | 2010-10-27 17:29:01 +0100 |
| commit | 7c7fcf762e405eb040ee10d22d656a791f616122 (patch) | |
| tree | 2ec4f320fe2d348ffbdab6aebc9a36bcbf13da34 /arch/mn10300/kernel/switch_to.S | |
| parent | a5e03ca2fd57a5823b759981bff8d19b46ddad4d (diff) | |
| download | talos-obmc-linux-7c7fcf762e405eb040ee10d22d656a791f616122.tar.gz talos-obmc-linux-7c7fcf762e405eb040ee10d22d656a791f616122.zip | |
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.S | 18 |
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 |
