How to build the kernel without any optimization?
Hi, I'm tracing the execution of ds1307_probe() and find that some of variables or function arguments cannot be printed in gdb because they are optimized out or not in the current context. This really gives some headache. Is there a way to build the kernel without any optimization? What gcc option shall I disable or add? I already added the following to arch/powerpc/Makefile. # Prevent GDB from jumping around in the code when trying to single step ifeq ($(CONFIG_DEBUG_KERNEL),y) KBUILD_CFLAGS += -fno-schedule-insns -fno-schedule-insns2 endif Thanks, -Shawn. ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
[PATCH] hvc_console: fix dropping of characters when output byte channel is full
hvc_console_print() calls the HVC client driver's put_chars() callback
to write some characters to the console. If the callback returns 0, that
indicates that no characters were written (perhaps the output buffer is
full), but hvc_console_print() treats that as an error and discards the
rest of the buffer.
So change hvc_console_print() to just loop and call put_chars() again if it
returns a 0 return code.
This change makes hvc_console_print() behave more like hvc_push(), which
does check for a 0 return code and re-schedules itself.
Signed-off-by: Timur Tabi
---
drivers/char/hvc_console.c | 19 ++-
1 files changed, 18 insertions(+), 1 deletions(-)
diff --git a/drivers/char/hvc_console.c b/drivers/char/hvc_console.c
index fa27d16..b4deffd 100644
--- a/drivers/char/hvc_console.c
+++ b/drivers/char/hvc_console.c
@@ -3,6 +3,7 @@
* Copyright (C) 2001 Paul Mackerras , IBM
* Copyright (C) 2004 Benjamin Herrenschmidt , IBM
Corp.
* Copyright (C) 2004 IBM Corporation
+ * Copyright 2009 Freescale Semiconductor, Inc.
*
* Additional Author(s):
* Ryan S. Arnold
@@ -141,6 +142,7 @@ static void hvc_console_print(struct console *co, const
char *b,
char c[N_OUTBUF] __ALIGNED__;
unsigned i = 0, n = 0;
int r, donecr = 0, index = co->index;
+ unsigned int timeout = 100; /* Keep trying for up to one second */
/* Console access attempt outside of acceptable console range. */
if (index >= MAX_NR_HVC_CONSOLES)
@@ -152,6 +154,10 @@ static void hvc_console_print(struct console *co, const
char *b,
while (count > 0 || i > 0) {
if (count > 0 && i < sizeof(c)) {
+ /* If the local buffer (c) is not full, then copy some
+* bytes from the input buffer to it. We stop when the
+* local buffer is full. \n is converted to \r\n.
+*/
if (b[n] == '\n' && !donecr) {
c[i++] = '\r';
donecr = 1;
@@ -162,14 +168,25 @@ static void hvc_console_print(struct console *co, const
char *b,
}
} else {
r = cons_ops[index]->put_chars(vtermnos[index], c, i);
- if (r <= 0) {
+ if (r < 0) {
/* throw away chars on error */
i = 0;
} else if (r > 0) {
i -= r;
if (i > 0)
memmove(c, c+r, i);
+ } else {
+ /* If r == 0, then the client driver didn't do
+* anything, so wait 1us and try again. If we
+* time out, then just exit.
+*/
+ if (!--timeout)
+ return;
+ udelay(1);
+ continue;
}
+ /* Reset the timeout */
+ timeout = 100;
}
}
}
--
1.7.0.1
___
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[PATCH] Documentation: fix ozlabs.org mailing list address
This list moved to lists.ozlabs.org quite some time ago. Signed-off-by: Stephen Rothwell --- Documentation/powerpc/hvcs.txt |2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/Documentation/powerpc/hvcs.txt b/Documentation/powerpc/hvcs.txt index f93462c..6d8be34 100644 --- a/Documentation/powerpc/hvcs.txt +++ b/Documentation/powerpc/hvcs.txt @@ -560,7 +560,7 @@ The proper channel for reporting bugs is either through the Linux OS distribution company that provided your OS or by posting issues to the PowerPC development mailing list at: -linuxppc-...@ozlabs.org +linuxppc-...@lists.ozlabs.org This request is to provide a documented and searchable public exchange of the problems and solutions surrounding this driver for the benefit of -- 1.7.1 -- Cheers, Stephen Rothwells...@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
[PATCH] MAINTAINERS: Fix ozlabs.org mailing list addresses
All these lists moved to lists.ozlabs.org quite a while ago. Signed-off-by: Stephen Rothwell --- MAINTAINERS | 56 1 files changed, 28 insertions(+), 28 deletions(-) diff --git a/MAINTAINERS b/MAINTAINERS index b5b8baa..433f353 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -456,7 +456,7 @@ F: drivers/infiniband/hw/amso1100/ AOA (Apple Onboard Audio) ALSA DRIVER M: Johannes Berg -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org L: alsa-de...@alsa-project.org (moderated for non-subscribers) S: Maintained F: sound/aoa/ @@ -1472,8 +1472,8 @@ F:include/linux/can/platform/ CELL BROADBAND ENGINE ARCHITECTURE M: Arnd Bergmann -L: linuxppc-...@ozlabs.org -L: cbe-oss-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org +L: cbe-oss-...@lists.ozlabs.org W: http://www.ibm.com/developerworks/power/cell/ S: Supported F: arch/powerpc/include/asm/cell*.h @@ -2371,13 +2371,13 @@ F: include/linux/fb.h FREESCALE DMA DRIVER M: Li Yang M: Zhang Wei -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Maintained F: drivers/dma/fsldma.* FREESCALE I2C CPM DRIVER M: Jochen Friedrich -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org L: linux-...@vger.kernel.org S: Maintained F: drivers/i2c/busses/i2c-cpm.c @@ -2393,7 +2393,7 @@ F:drivers/video/imxfb.c FREESCALE SOC FS_ENET DRIVER M: Pantelis Antoniou M: Vitaly Bordug -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org L: net...@vger.kernel.org S: Maintained F: drivers/net/fs_enet/ @@ -2401,7 +2401,7 @@ F:include/linux/fs_enet_pd.h FREESCALE QUICC ENGINE LIBRARY M: Timur Tabi -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Supported F: arch/powerpc/sysdev/qe_lib/ F: arch/powerpc/include/asm/*qe.h @@ -2409,27 +2409,27 @@ F: arch/powerpc/include/asm/*qe.h FREESCALE USB PERIPHERAL DRIVERS M: Li Yang L: linux-...@vger.kernel.org -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Maintained F: drivers/usb/gadget/fsl* FREESCALE QUICC ENGINE UCC ETHERNET DRIVER M: Li Yang L: net...@vger.kernel.org -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Maintained F: drivers/net/ucc_geth* FREESCALE QUICC ENGINE UCC UART DRIVER M: Timur Tabi -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Supported F: drivers/serial/ucc_uart.c FREESCALE SOC SOUND DRIVERS M: Timur Tabi L: alsa-de...@alsa-project.org (moderated for non-subscribers) -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Supported F: sound/soc/fsl/fsl* F: sound/soc/fsl/mpc8610_hpcd.c @@ -2564,7 +2564,7 @@ F:mm/memory-failure.c F: mm/hwpoison-inject.c HYPERVISOR VIRTUAL CONSOLE DRIVER -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Odd Fixes F: drivers/char/hvc_* @@ -3476,7 +3476,7 @@ F:drivers/usb/misc/legousbtower.c LGUEST M: Rusty Russell -L: lgu...@ozlabs.org +L: lgu...@lists.ozlabs.org W: http://lguest.ozlabs.org/ S: Maintained F: Documentation/lguest/ @@ -3495,7 +3495,7 @@ LINUX FOR POWERPC (32-BIT AND 64-BIT) M: Benjamin Herrenschmidt M: Paul Mackerras W: http://www.penguinppc.org/ -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org Q: http://patchwork.ozlabs.org/project/linuxppc-dev/list/ T: git git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc.git S: Supported @@ -3505,14 +3505,14 @@ F: arch/powerpc/ LINUX FOR POWER MACINTOSH M: Benjamin Herrenschmidt W: http://www.penguinppc.org/ -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org S: Maintained F: arch/powerpc/platforms/powermac/ F: drivers/macintosh/ LINUX FOR POWERPC EMBEDDED MPC5XXX M: Grant Likely -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org T: git git://git.secretlab.ca/git/linux-2.6.git S: Maintained F: arch/powerpc/platforms/512x/ @@ -3522,7 +3522,7 @@ LINUX FOR POWERPC EMBEDDED PPC4XX M: Josh Boyer M: Matt Porter W: http://www.penguinppc.org/ -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org T: git git://git.kernel.org/pub/scm/linux/kernel/git/jwboyer/powerpc-4xx.git S: Maintained F: arch/powerpc/platforms/40x/ @@ -3531,7 +3531,7 @@ F:arch/powerpc/platforms/44x/ LINUX FOR POWERPC EMBEDDED XILINX VIRTEX M: Grant Likely W: http://wiki.secretlab.ca/index.php/Linux_on_Xilinx_Virtex -L: linuxppc-...@ozlabs.org +L: linuxppc-dev@lists.ozlabs.org T: git git://git.secretlab.ca/git/linux-2.6.git S: Maintained F
Re: cc'ing old list
Hi Christoph, On Fri, 20 Aug 2010 10:36:58 +0200 Christoph Hellwig wrote: > > On Fri, Aug 20, 2010 at 01:26:42PM +1000, Stephen Rothwell wrote: > > Yes, I do know that the kernel MAINTAINERS file has the old address. :-( > > Time to fix it.. Yeah. Patch on its way ... -- Cheers, Stephen Rothwells...@canb.auug.org.au http://www.canb.auug.org.au/~sfr/ pgpJXMqvcb8jf.pgp Description: PGP signature ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: cc'ing old list
On Fri, Aug 20, 2010 at 01:26:42PM +1000, Stephen Rothwell wrote: > Yes, I do know that the kernel MAINTAINERS file has the old address. :-( Time to fix it.. ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH v2 0/3] Misc. bug fixes for ppc32
On Wed, Aug 18, 2010 at 11:56:48PM -0500, Matthew McClintock wrote: > This patch series fixes a few issues I have discovered with my previous > patch series. Nothing new has been added. Thanks, all applied. ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
Re: [PATCH v4] powerpc/mpc8xxx_gpio.c: extend the driver to support mpc512x gpios
> "Anatolij" == Anatolij Gustschin writes: Anatolij> The GPIO controller of MPC512x is slightly different from Anatolij> 8xxx GPIO controllers. The register interface is the same Anatolij> except the external interrupt control register. The MPC512x Anatolij> GPIO controller differentiates between four interrupt event Anatolij> types and therefore provides two interrupt control registers, Anatolij> GPICR1 and GPICR2. GPIO[0:15] interrupt event types are Anatolij> configured in GPICR1 register, GPIO[16:31] - in GPICR2 register. Anatolij> This patch adds MPC512x speciffic set_type() callback and Anatolij> updates config file and comments. Additionally the gpio chip Anatolij> registration function is changed to use for_each_matching_node() Anatolij> preventing multiple registration if a node claimes compatibility Anatolij> with another gpio controller type. Anatolij> Signed-off-by: Anatolij Gustschin Sorry, was away on holiday. Acked-by: Peter Korsgaard -- Bye, Peter Korsgaard ___ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev
