diff options
| author | David Gibson <david@gibson.dropbear.id.au> | 2005-10-21 15:45:50 +1000 |
|---|---|---|
| committer | Paul Mackerras <paulus@samba.org> | 2005-10-21 22:47:23 +1000 |
| commit | 6cb7bfebb145af5ea1d052512a2ae7ff07a47202 (patch) | |
| tree | 677ce52e6ad423f8a652ec3e16f98c3ad33fcc54 /arch/ppc64/kernel | |
| parent | b0faa28493f97b55b36ff5b1a2b8c81bf253a460 (diff) | |
[PATCH] powerpc: Merge thread_info.h
Merge ppc32 and ppc64 versions of thread_info.h. They were pretty
similar already, the chief changes are:
- Instead of inline asm to implement current_thread_info(),
which needs to be different for ppc32 and ppc64, we use C with an
asm("r1") register variable. gcc turns it into the same asm as we
used to have for both platforms.
- We replace ppc32's 'local_flags' with the ppc64
'syscall_noerror' field. The noerror flag was in fact the only thing
in the local_flags field anyway, so the ppc64 approach is simpler, and
means we only need a load-immediate/store instead of load/mask/store
when clearing the flag.
- In readiness for 64k pages, when THREAD_SIZE will be less
than a page, ppc64 used kmalloc() rather than get_free_pages() to
allocate the kernel stack. With this patch we do the same for ppc32,
since there's no strong reason not to.
- For ppc64, we no longer export THREAD_SHIFT and THREAD_SIZE
via asm-offsets, thread_info.h can now be safely included in asm, as
on ppc32.
Built and booted on G4 Powerbook (ARCH=ppc and ARCH=powerpc) and
Power5 (ARCH=ppc64 and ARCH=powerpc).
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
Diffstat (limited to 'arch/ppc64/kernel')
| -rw-r--r-- | arch/ppc64/kernel/asm-offsets.c | 2 | ||||
| -rw-r--r-- | arch/ppc64/kernel/head.S | 1 | ||||
| -rw-r--r-- | arch/ppc64/kernel/misc.S | 1 |
3 files changed, 2 insertions, 2 deletions
diff --git a/arch/ppc64/kernel/asm-offsets.c b/arch/ppc64/kernel/asm-offsets.c index 1378fbbe1e5..5e6046cb414 100644 --- a/arch/ppc64/kernel/asm-offsets.c +++ b/arch/ppc64/kernel/asm-offsets.c @@ -46,8 +46,6 @@ int main(void) { /* thread struct on stack */ - DEFINE(THREAD_SHIFT, THREAD_SHIFT); - DEFINE(THREAD_SIZE, THREAD_SIZE); DEFINE(TI_FLAGS, offsetof(struct thread_info, flags)); DEFINE(TI_PREEMPT, offsetof(struct thread_info, preempt_count)); DEFINE(TI_SC_NOERR, offsetof(struct thread_info, syscall_noerror)); diff --git a/arch/ppc64/kernel/head.S b/arch/ppc64/kernel/head.S index d5e6be20076..15c5f0c4804 100644 --- a/arch/ppc64/kernel/head.S +++ b/arch/ppc64/kernel/head.S @@ -36,6 +36,7 @@ #include <asm/setup.h> #include <asm/hvcall.h> #include <asm/iSeries/LparMap.h> +#include <asm/thread_info.h> #ifdef CONFIG_PPC_ISERIES #define DO_SOFT_DISABLE diff --git a/arch/ppc64/kernel/misc.S b/arch/ppc64/kernel/misc.S index ad73aad8dbb..a33448c2bd9 100644 --- a/arch/ppc64/kernel/misc.S +++ b/arch/ppc64/kernel/misc.S @@ -28,6 +28,7 @@ #include <asm/ppc_asm.h> #include <asm/asm-offsets.h> #include <asm/cputable.h> +#include <asm/thread_info.h> .text |