mirror of https://gitee.com/openkylin/linux.git
6cb7bfebb1
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>
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|---|---|---|
| .. | ||
| Makefile | ||
| asm-offsets.c | ||
| binfmt_elf32.c | ||
| btext.c | ||
| cputable.c | ||
| entry_32.S | ||
| entry_64.S | ||
| fpu.S | ||
| head_4xx.S | ||
| head_8xx.S | ||
| head_32.S | ||
| head_44x.S | ||
| head_64.S | ||
| head_fsl_booke.S | ||
| idle_6xx.S | ||
| idle_power4.S | ||
| init_task.c | ||
| lparmap.c | ||
| misc_32.S | ||
| misc_64.S | ||
| of_device.c | ||
| pmc.c | ||
| ppc_ksyms.c | ||
| process.c | ||
| prom.c | ||
| prom_init.c | ||
| ptrace.c | ||
| ptrace32.c | ||
| semaphore.c | ||
| setup_32.c | ||
| setup_64.c | ||
| signal_32.c | ||
| sys_ppc32.c | ||
| syscalls.c | ||
| systbl.S | ||
| time.c | ||
| traps.c | ||
| vecemu.c | ||
| vector.S | ||
| vmlinux.lds.S | ||