linux-toradex.git/include/asm-powerpc/uaccess.h, branch v2.6.19.2 Linux kernel for Apalis and Colibri modules powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addresses 2006-05-03T13:06:46+00:00 Paul Mackerras paulus@samba.org 2006-05-03T13:02:04+00:00 6bfd93c32a5065d0e858780b3beb0b667081601c 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> 
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>
[PATCH] powerpc: Consolidate asm compatibility macros 2005-11-10T02:10:38+00:00 David Gibson david@gibson.dropbear.id.au 2005-11-10T01:56:55+00:00 3ddfbcf19b15ccd25a0b4b2dc2e38000e08de739 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> 
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>
powerpc: clean up uaccess.h 2005-11-01T04:53:19+00:00 Stephen Rothwell sfr@canb.auug.org.au 2005-11-01T04:53:19+00:00 48fe4871569f019c653efb95b26dda976f84c468 Use the best from each architecture. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> 
Use the best from each architecture.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
powerpc: fix __strnlen_user in merge tree 2005-11-01T03:34:17+00:00 Stephen Rothwell sfr@canb.auug.org.au 2005-10-31T07:39:20+00:00 5015b49448cbe5352b9cc232333ab26f3e608a07 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> 
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>
powerpc: merge uaccess.h 2005-11-01T03:34:03+00:00 Stephen Rothwell sfr@canb.auug.org.au 2005-10-29T07:51:31+00:00 2df5e8bcca53e528a78ee0e3b114d0d21dd6d043 There is still a bug to be fixed and more merging to be done. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> 
There is still a bug to be fixed and more merging to be done.

Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>