linux-stable.git/arch/sparc/lib, branch linux-3.6.y

sparc64: Consistently use fsrc2 rather than fmovd in optimized asm.

2012-06-27T08:25:23+00:00

Because fsrc2, unlike fmovd, does not update the %fsr register.

Signed-off-by: David S. Miller

sparc: use the new generic strnlen_user() function

2012-05-26T18:33:54+00:00

This throws away the sparc-specific functions in favor of the generic
optimized version.

Signed-off-by: Linus Torvalds

lib: Sparc's strncpy_from_user is generic enough, move under lib/

2012-05-24T20:12:28+00:00

To use this, an architecture simply needs to:

1) Provide a user_addr_max() implementation via asm/uaccess.h

2) Add "select GENERIC_STRNCPY_FROM_USER" to their arch Kcnfig

3) Remove the existing strncpy_from_user() implementation and symbol
   exports their architecture had.

Signed-off-by: David S. Miller 
Acked-by: David Howells

kernel: Move REPEAT_BYTE definition into linux/kernel.h

2012-05-24T20:10:05+00:00

And make sure that everything using it explicitly includes
that header file.

Signed-off-by: David S. Miller

sparc: Increase portability of strncpy_from_user() implementation.

2012-05-24T20:04:24+00:00

Hide details of maximum user address calculation in a new
asm/uaccess.h interface named user_addr_max().

Provide little-endian implementation in find_zero(), which should work
but can probably be improved.

Abstrace alignment check behind IS_UNALIGNED() macro.

Kill double-semicolon, noticed by David Howells.

Signed-off-by: David S. Miller

sparc: Optimize strncpy_from_user() zero byte search.

2012-05-24T02:20:20+00:00

Compute a mask that will only have 0x80 in the bytes which
had a zero in them.  The formula is:

	~(((x & 0x7f7f7f7f) + 0x7f7f7f7f) | x | 0x7f7f7f7f)

In the inner word iteration, we have to compute the "x | 0x7f7f7f7f"
part, so we can reuse that in the above calculation.

Once we have this mask, we perform divide and conquer to find the
highest 0x80 location.

Signed-off-by: David S. Miller

sparc: Add full proper error handling to strncpy_from_user().

2012-05-23T06:32:27+00:00

Linus removed the end-of-address-space hackery from
fs/namei.c:do_getname() so we really have to validate these edge
conditions and cannot cheat any more (as x86 used to as well).

Move to a common C implementation like x86 did.  And if both
src and dst are sufficiently aligned we'll do word at a time
copies and checks as well.

Signed-off-by: David S. Miller

sparc32: Add ucmpdi2.o to obj-y instead of lib-y.

2012-05-19T22:27:01+00:00

Otherwise if no references exist in the static kernel image,
we won't export the symbol properly to modules.

Signed-off-by: David S. Miller

sparc32: add ucmpdi2

2012-05-19T22:23:57+00:00

Based on copy from microblaze add ucmpdi2 implementation.
This fixes build of niu driver which failed with:

drivers/built-in.o: In function `niu_get_nfc':
niu.c:(.text+0x91494): undefined reference to `__ucmpdi2'

This driver will never be used on a sparc32 system,
but patch added to fix build breakage with all*config builds.

Signed-off-by: Sam Ravnborg 
Signed-off-by: David S. Miller

sparc32: Kill off software 32-bit multiply/divide routines.

2012-05-15T18:23:47+00:00

For the explicit calls to .udiv/.umul in assembler, I made a
mechanical (read as: safe) transformation.  I didn't attempt
to make any simplifications.

In particular, __ndelay and __udelay can be simplified significantly.
Some of the %y reads are unnecessary and these routines have no need
any longer for allocating a register window, they can be leaf
functions.

Signed-off-by: David S. Miller