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path: root/include/asm-powerpc/uaccess.h
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2008-07-22powerpc: Use PPC_LONG_ALIGN in uaccess.hMichael Ellerman
Use the new PPC_LONG_ALIGN macro instead of passing an argument to the asm for consistency. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Signed-off-by: Benjamin Herrenschmidt <benh@kernel.crashing.org>
2008-05-15[POWERPC] Fix uninitialized variable bug in copy_{to|from}_userNate Case
Calls to copy_to_user() or copy_from_user() can fail when copying N bytes, where N is a constant less than 8, but not 1, 2, 4, or 8, because 'ret' is not initialized and is only set if the size is 1, 2, 4 or 8, but is tested after the switch statement for any constant size <= 8. This fixes it by initializing 'ret' to 1, causing the code to fall through to the __copy_tofrom_user call for sizes other than 1, 2, 4 or 8. Signed-off-by: Dave Scidmore <dscidmore@xes-inc.com> Signed-off-by: Nate Case <ncase@xes-inc.com> Signed-off-by: Paul Mackerras <paulus@samba.org>
2007-04-13[POWERPC] Add inatomic versions of __get_user and __put_userBenjamin Herrenschmidt
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>
2006-12-04[POWERPC] include/asm-powerpc/: "extern inline" -> "static inline"Adrian Bunk
"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>
2006-05-03powerpc: Fix incorrect might_sleep in __get_user/__put_user on kernel addressesPaul Mackerras
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>
2005-11-10[PATCH] powerpc: Consolidate asm compatibility macrosDavid Gibson
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>
2005-11-01powerpc: clean up uaccess.hStephen Rothwell
Use the best from each architecture. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
2005-11-01powerpc: fix __strnlen_user in merge treeStephen Rothwell
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>
2005-11-01powerpc: merge uaccess.hStephen Rothwell
There is still a bug to be fixed and more merging to be done. Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>