[oe] [PATCH] linux-handhelds-2.6: fix compilation with gcc-4.3

[Paul Eggleton]

Acked-by: Paul Eggleton <bluelightning at bluelightning.org>

On Fri, 22 May 2009, Dmitry Artamonow wrote:
> Backport time.h patch from 2.6.25 kernel
> (commit 38332cb98772f5ea757e6486bed7ed0381cb5f98)
>
> It fixes following error during compilation:
>   LD      .tmp_vmlinux1
> kernel/built-in.o: In function `getnstimeofday':
> utsname_sysctl.c:(.text+0xf110): undefined reference to `__aeabi_uldivmod'
> kernel/built-in.o: In function `do_gettimeofday':
> utsname_sysctl.c:(.text+0xf1d0): undefined reference to `__aeabi_uldivmod'
> utsname_sysctl.c:(.text+0xf1ec): undefined reference to `__aeabi_uldivmod'
> kernel/built-in.o: In function `do_timer':
> utsname_sysctl.c:(.text+0x100ec): undefined reference to `__aeabi_uldivmod'
> utsname_sysctl.c:(.text+0x1010c): undefined reference to `__aeabi_uldivmod'
> make: *** [.tmp_vmlinux1] Error 1
>
> See also similar OE bug #4333
>
> Signed-off-by: Dmitry Artamonow <mad_soft at inbox.ru>
> ---
>  ...vent-the-loop-in-timespec_add_ns-from-bei.patch |   34
> ++++++++++++++++++++ recipes/linux/linux-handhelds-2.6_2.6.21-hh20.bb   |  
>  3 +-
>  2 files changed, 36 insertions(+), 1 deletions(-)
>  create mode 100644
> recipes/linux/linux-handhelds-2.6-2.6.21/0001-time-prevent-the-loop-in-time
>spec_add_ns-from-bei.patch
>
> diff --git
> a/recipes/linux/linux-handhelds-2.6-2.6.21/0001-time-prevent-the-loop-in-ti
>mespec_add_ns-from-bei.patch
> b/recipes/linux/linux-handhelds-2.6-2.6.21/0001-time-prevent-the-loop-in-ti
>mespec_add_ns-from-bei.patch new file mode 100644
> index 0000000..ad10b67
> --- /dev/null
> +++
> b/recipes/linux/linux-handhelds-2.6-2.6.21/0001-time-prevent-the-loop-in-ti
>mespec_add_ns-from-bei.patch @@ -0,0 +1,34 @@
> +From 38332cb98772f5ea757e6486bed7ed0381cb5f98 Mon Sep 17 00:00:00 2001
> +From: Segher Boessenkool <segher at kernel.crashing.org>
> +Date: Tue, 4 Mar 2008 14:59:54 -0800
> +Subject: [PATCH] time: prevent the loop in timespec_add_ns() from being
> optimised away +
> +Since some architectures don't support __udivdi3().
> +
> +Signed-off-by: Segher Boessenkool <segher at kernel.crashing.org>
> +Cc: john stultz <johnstul at us.ibm.com>
> +Cc: Ingo Molnar <mingo at elte.hu>
> +Signed-off-by: Andrew Morton <akpm at linux-foundation.org>
> +Signed-off-by: Thomas Gleixner <tglx at linutronix.de>
> +---
> + include/linux/time.h |    4 ++++
> + 1 files changed, 4 insertions(+), 0 deletions(-)
> +
> +diff --git a/include/linux/time.h b/include/linux/time.h
> +index 2091a19..d32ef0a 100644
> +--- a/include/linux/time.h
> ++++ b/include/linux/time.h
> +@@ -174,6 +174,10 @@ static inline void timespec_add_ns(struct timespec
> *a, u64 ns) + {
> + 	ns += a->tv_nsec;
> + 	while(unlikely(ns >= NSEC_PER_SEC)) {
> ++		/* The following asm() prevents the compiler from
> ++		 * optimising this loop into a modulo operation.  */
> ++		asm("" : "+r"(ns));
> ++
> + 		ns -= NSEC_PER_SEC;
> + 		a->tv_sec++;
> + 	}
> +--
> +1.6.0.6
> +
> diff --git a/recipes/linux/linux-handhelds-2.6_2.6.21-hh20.bb
> b/recipes/linux/linux-handhelds-2.6_2.6.21-hh20.bb index f6bb173..d955c0a
> 100644
> --- a/recipes/linux/linux-handhelds-2.6_2.6.21-hh20.bb
> +++ b/recipes/linux/linux-handhelds-2.6_2.6.21-hh20.bb
> @@ -1,7 +1,7 @@
>  SECTION = "kernel"
>  DESCRIPTION = "handhelds.org Linux kernel 2.6 for PocketPCs and other
> consumer handheld devices." LICENSE = "GPL"
> -PR = "r25"
> +PR = "r26"
>
>  DEFAULT_PREFERENCE = "-1"
>
> @@ -13,6 +13,7 @@ SRC_URI =
> "${HANDHELDS_CVS};module=linux/kernel26;tag=${@'K' + bb.data.getVar('P
> file://linux-2.6.git-9d20fdd58e74d4d26dc5216efaaa0f800c23dd3a.patch;patch=1
> \
> http://www.rpsys.net/openzaurus/patches/archive/export_atags-r0a.patch;patc
>h=1 \ file://gcc4x-limits.patch;patch=1 \
> +          
> file://0001-time-prevent-the-loop-in-timespec_add_ns-from-bei.patch;patch=1
> \ file://defconfig"
>
>  require linux-handhelds-2.6.inc