Commit Graph

7 Commits

Author SHA1 Message Date
Benjamin Herrenschmidt
e68c825bb0 [POWERPC] Add inatomic versions of __get_user and __put_user
Those are needed by things like alignment exception fixup handlers
since those can now be triggered by copy_tofrom_user_inatomic.

Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-13 04:09:38 +10:00
Adrian Bunk
4cfbdfff70 [POWERPC] include/asm-powerpc/: "extern inline" -> "static inline"
"extern inline" generates a warning with -Wmissing-prototypes and I'm
currently working on getting the kernel cleaned up for adding this to
the CFLAGS since it will help us to avoid a nasty class of runtime
errors.

If there are places that really need a forced inline, __always_inline
would be the correct solution.

Signed-off-by: Adrian Bunk <bunk@stusta.de>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-12-04 20:41:26 +11:00
Paul Mackerras
6bfd93c32a powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addresses
We have a case where __get_user and __put_user can validly be used
on kernel addresses in interrupt context - namely, the alignment
exception handler, as our get/put_unaligned just do a single access
and rely on the alignment exception handler to fix things up in the
rare cases where the cpu can't handle it in hardware.  Thus we can
get alignment exceptions in the network stack at interrupt level.
The alignment exception handler does a __get_user to read the
instruction and blows up in might_sleep().

Since a __get_user on a kernel address won't actually ever sleep,
this makes the might_sleep conditional on the address being less
than PAGE_OFFSET.

Signed-off-by: Paul Mackerras <paulus@samba.org>
2006-05-03 23:06:46 +10:00
David Gibson
3ddfbcf19b [PATCH] powerpc: Consolidate asm compatibility macros
This patch consolidates macros used to generate assembly for
compatibility across different CPUs or configs.  A new header,
asm-powerpc/asm-compat.h contains the main compatibility macros.  It
uses some preprocessor magic to make the macros suitable both for use
in .S files, and in inline asm in .c files.  Headers (bitops.h,
uaccess.h, atomic.h, bug.h) which had their own such compatibility
macros are changed to use asm-compat.h.

ppc_asm.h is now for use in .S files *only*, and a #error enforces
that.  As such, we're a lot more careless about namespace pollution
here than in asm-compat.h.

While we're at it, this patch adds a call to the PPC405_ERR77 macro in
futex.h which should have had it already, but didn't.

Built and booted on pSeries, Maple and iSeries (ARCH=powerpc).  Built
for 32-bit powermac (ARCH=powerpc) and Walnut (ARCH=ppc).

Signed-off-by: David Gibson <dwg@au1.ibm.com>
Signed-off-by: Paul Mackerras <paulus@samba.org>
2005-11-10 13:10:38 +11:00
Stephen Rothwell
48fe487156 powerpc: clean up uaccess.h
Use the best from each architecture.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-01 15:53:19 +11:00
Stephen Rothwell
5015b49448 powerpc: fix __strnlen_user in merge tree
Change USER/KERNEL_DS so that the merged version of
__strnlen_user can be used which allows us to complete the
removal of arch/ppc64/lib/.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-01 14:34:17 +11:00
Stephen Rothwell
2df5e8bcca powerpc: merge uaccess.h
There is still a bug to be fixed and more merging to be done.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-01 14:34:03 +11:00