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  1. 15 1月, 2006 1 次提交
  3. 14 1月, 2006 34 次提交
  5. 13 1月, 2006 5 次提交
    • A
      [PATCH] powerpc: reformat atomic_add_unless · b11fa580
      由 Anton Blanchard 提交于 
      It makes my eyes hurt.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      b11fa580
    • A
      [PATCH] powerpc: use lwsync in atomics, bitops, lock functions · 144b9c13
      由 Anton Blanchard 提交于 
      eieio is only a store - store ordering. When used to order an unlock
operation loads may leak out of the critical region. This is potentially
buggy, one example is if a user wants to atomically read a couple of
values.

We can solve this with an lwsync which orders everything except store - load.

I removed the (now unused) EIEIO_ON_SMP macros and the c versions
isync_on_smp and eieio_on_smp now we dont use them. I also removed some
old comments that were used to identify inline spinlocks in assembly,
they dont make sense now our locks are out of line.

Another interesting thing was that read_unlock was using an eieio even
though the rest of the spinlock code had already been converted to
use lwsync.
Signed-off-by: NAnton Blanchard <anton@samba.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      144b9c13
    • D
      [PATCH] powerpc: Remove lppaca structure from the PACA · 3356bb9f
      由 David Gibson 提交于 
      At present the lppaca - the structure shared with the iSeries
hypervisor and phyp - is contained within the PACA, our own low-level
per-cpu structure.  This doesn't have to be so, the patch below
removes it, making a separate array of lppaca structures.

This saves approximately 500*NR_CPUS bytes of image size and kernel
memory, because we don't need aligning gap between the Linux and
hypervisor portions of every PACA.  On the other hand it means an
extra level of dereference in many accesses to the lppaca.

The patch also gets rid of several places where we assign the paca
address to a local variable for no particular reason.
Signed-off-by: NDavid Gibson <dwg@au1.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      3356bb9f
    • D
      [PATCH] powerpc: Cleanup LOADADDR etc. asm macros · e58c3495
      由 David Gibson 提交于 
      This patch consolidates the variety of macros used for loading 32 or
64-bit constants in assembler (LOADADDR, LOADBASE, SET_REG_TO_*).  The
idea is to make the set of macros consistent across 32 and 64 bit and
to make it more obvious which is the appropriate one to use in a given
situation.  The new macros and their semantics are described in the
comments in ppc_asm.h.

In the process, we change several places that were unnecessarily using
immediate loads on ppc64 to use the GOT/TOC.  Likewise we cleanup a
couple of places where we were clumsily subtracting PAGE_OFFSET with
asm instructions to use assemble-time arithmetic or the toreal() macro
instead.
Signed-off-by: NDavid Gibson <dwg@au1.ibm.com>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      e58c3495
    • K
      [PATCH] powerpc: Updated platforms that use gianfar to match driver · 7e78e5e5
      由 Kumar Gala 提交于 
      The gianfar driver changed how it required MDIO bus and phy id's
to be passed to it.  Also, it no longer passes the physical address
of the MDIO bus.  Instead we have a proper platform device.
Signed-off-by: NKumar Gala <galak@kernel.crashing.org>
Signed-off-by: NPaul Mackerras <paulus@samba.org>
      7e78e5e5