ARM: 8844/1: use unified assembler in assembly files

Use unified assembler syntax (UAL) in assembly files. Divided
syntax is considered deprecated. This will also allow to build
the kernel using LLV

ARM: 8844/1: use unified assembler in assembly files

Use unified assembler syntax (UAL) in assembly files. Divided
syntax is considered deprecated. This will also allow to build
the kernel using LLVM's integrated assembler.

Signed-off-by: Stefan Agner <[email protected]>
Acked-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russell King <[email protected]>

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Revert "arm: move exports to definitions"

This reverts commit 4dd1837d7589f468ed109556513f476e7a7f9121.

Moving the exports for assembly code into the assembly files breaks
KSYM trimming, but also b

Revert "arm: move exports to definitions"

This reverts commit 4dd1837d7589f468ed109556513f476e7a7f9121.

Moving the exports for assembly code into the assembly files breaks
KSYM trimming, but also breaks modversions.

While fixing the KSYM trimming is trivial, fixing modversions brings
us to a technically worse position that we had prior to the above
change:

- We end up with the prototype definitions divorsed from everything
else, which means that adding or removing assembly level ksyms
become more fragile:
* if adding a new assembly ksyms export, a missed prototype in
asm-prototypes.h results in a successful build if no module in
the selected configuration makes use of the symbol.
* when removing a ksyms export, asm-prototypes.h will get forgotten,
with armksyms.c, you'll get a build error if you forget to touch
the file.

- We end up with the same amount of include files and prototypes,
they're just in a header file instead of a .c file with their
exports.

As for lines of code, we don't get much of a size reduction:
(original commit)
47 files changed, 131 insertions(+), 208 deletions(-)
(fix for ksyms trimming)
7 files changed, 18 insertions(+), 5 deletions(-)
(two fixes for modversions)
1 file changed, 34 insertions(+)
3 files changed, 7 insertions(+), 2 deletions(-)
which results in a net total of only 25 lines deleted.

As there does not seem to be much benefit from this change of approach,
revert the change.

Signed-off-by: Russell King <[email protected]>

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arm: move exports to definitions

Signed-off-by: Al Viro <[email protected]>

ARM: 8477/1: runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()

The ARM compiler inserts calls to __aeabi_idiv() and
__aeabi_uidiv() when it needs to perform division on signed and
unsigned

ARM: 8477/1: runtime patch udiv/sdiv instructions into __aeabi_{u}idiv()

The ARM compiler inserts calls to __aeabi_idiv() and
__aeabi_uidiv() when it needs to perform division on signed and
unsigned integers. If a processor has support for the sdiv and
udiv instructions, the kernel may overwrite the beginning of those
functions with those instructions and a "bx lr" to get better
performance.

To ensure that those functions are aligned to a 32-bit word for easier
patching (which might not always be the case in Thumb mode) and that
the two patched instructions end up in the same cache line, a 8-byte
alignment is enforced when ARM_PATCH_IDIV is selected.

This was heavily inspired by a previous patch from Stephen Boyd.

Signed-off-by: Nicolas Pitre <[email protected]>
Acked-by: Arnd Bergmann <[email protected]>
Signed-off-by: Russell King <[email protected]>

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ARM: lib/lib1funcs.S: fix typo s/substractions/subtractions/

Signed-off-by: Antonio Ospite <[email protected]>
Cc: Russell King <[email protected]>
Cc: Christoffer Dall <[email protected]>
C

ARM: lib/lib1funcs.S: fix typo s/substractions/subtractions/

Signed-off-by: Antonio Ospite <[email protected]>
Cc: Russell King <[email protected]>
Cc: Christoffer Dall <[email protected]>
Cc: [email protected]
Acked-by: Russell King <[email protected]>
Signed-off-by: Jiri Kosina <[email protected]>

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ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

ARMv6 and greater introduced a new instruction ("bx") which can be used
to return from function calls. Recent CPUs perform better when the
"b

ARM: convert all "mov.* pc, reg" to "bx reg" for ARMv6+

ARMv6 and greater introduced a new instruction ("bx") which can be used
to return from function calls. Recent CPUs perform better when the
"bx lr" instruction is used rather than the "mov pc, lr" instruction,
and this sequence is strongly recommended to be used by the ARM
architecture manual (section A.4.1.1).

We provide a new macro "ret" with all its variants for the condition
code which will resolve to the appropriate instruction.

Rather than doing this piecemeal, and miss some instances, change all
the "mov pc" instances to use the new macro, with the exception of
the "movs" instruction and the kprobes code. This allows us to detect
the "mov pc, lr" case and fix it up - and also gives us the possibility
of deploying this for other registers depending on the CPU selection.

Reported-by: Will Deacon <[email protected]>
Tested-by: Stephen Warren <[email protected]> # Tegra Jetson TK1
Tested-by: Robert Jarzmik <[email protected]> # mioa701_bootresume.S
Tested-by: Andrew Lunn <[email protected]> # Kirkwood
Tested-by: Shawn Guo <[email protected]>
Tested-by: Tony Lindgren <[email protected]> # OMAPs
Tested-by: Gregory CLEMENT <[email protected]> # Armada XP, 375, 385
Acked-by: Sekhar Nori <[email protected]> # DaVinci
Acked-by: Christoffer Dall <[email protected]> # kvm/hyp
Acked-by: Haojian Zhuang <[email protected]> # PXA3xx
Acked-by: Stefano Stabellini <[email protected]> # Xen
Tested-by: Uwe Kleine-König <[email protected]> # ARMv7M
Tested-by: Simon Horman <[email protected]> # Shmobile
Signed-off-by: Russell King <[email protected]>

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ARM: 6945/1: Add unwinding support for division functions

The software division functions never had unwinding annotations
added. Currently, when a division by zero occurs the backtrace shown
will st

ARM: 6945/1: Add unwinding support for division functions

The software division functions never had unwinding annotations
added. Currently, when a division by zero occurs the backtrace shown
will stop at Ldiv0 or some completely unrelated function. Add
unwinding annotations in hopes of getting a more useful backtrace
when a division by zero occurs.

Signed-off-by: Laura Abbott <[email protected]>
Acked-by: Dave Martin <[email protected]>
Signed-off-by: Russell King <[email protected]>

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Nicolas Pitre has a new email address

Due to problems at cam.org, my [email protected] email address is no longer
valid. FRom now on, [email protected] should be used instead.

Signed-off-by: Nicolas Pit

Nicolas Pitre has a new email address

Due to problems at cam.org, my [email protected] email address is no longer
valid. FRom now on, [email protected] should be used instead.

Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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[ARM] 5227/1: Add the ENDPROC declarations to the .S files

This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
ins

[ARM] 5227/1: Add the ENDPROC declarations to the .S files

This declaration specifies the "function" type and size for various
assembly functions, mainly needed for generating the correct branch
instructions in Thumb-2.

Signed-off-by: Catalin Marinas <[email protected]>
Signed-off-by: Russell King <[email protected]>

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[ARM] 3104/1: ARM EABI: new helper function names

Patch from Nicolas Pitre

The ARM EABI defines new names for GCC helper functions.

Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russe

[ARM] 3104/1: ARM EABI: new helper function names

Patch from Nicolas Pitre

The ARM EABI defines new names for GCC helper functions.

Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russell King <[email protected]>

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[ARM] 3103/1: ARM EABI: stack pointer must be 64-bit aligned (part 2)

Patch from Nicolas Pitre

We must make sure that assembly code that modifies the stack pointer
before calling a C function does

[ARM] 3103/1: ARM EABI: stack pointer must be 64-bit aligned (part 2)

Patch from Nicolas Pitre

We must make sure that assembly code that modifies the stack pointer
before calling a C function does it so it remains 64-bit aligned.

Signed-off-by: Nicolas Pitre <[email protected]>
Signed-off-by: Russell King <[email protected]>

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Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in

Linux-2.6.12-rc2

Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.

Let it rip!

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