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/powerpc/kernel/misc_64.S | |
| parent | b0faa28493f97b55b36ff5b1a2b8c81bf253a460 (diff) | |
| download | lwn-6cb7bfebb145af5ea1d052512a2ae7ff07a47202.tar.gz lwn-6cb7bfebb145af5ea1d052512a2ae7ff07a47202.zip | |
[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/powerpc/kernel/misc_64.S')
| -rw-r--r-- | arch/powerpc/kernel/misc_64.S | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/arch/powerpc/kernel/misc_64.S b/arch/powerpc/kernel/misc_64.S index 8fe295693c09..4775bed42cac 100644 --- a/arch/powerpc/kernel/misc_64.S +++ b/arch/powerpc/kernel/misc_64.S @@ -26,6 +26,7 @@ #include <asm/ppc_asm.h> #include <asm/asm-offsets.h> #include <asm/cputable.h> +#include <asm/thread_info.h> .text |