From 8c7c7c9bf39470c9689ad43cae3142cf948f4cfb Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Thu, 19 Oct 2006 23:28:34 -0700 Subject: [PATCH] Fix warnings for WARN_ON if CONFIG_BUG is disabled MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit In most cases the return value of WARN_ON() is ignored. If the generic definition for the !CONFIG_BUG case is used this will result in a warning: CC kernel/sched.o In file included from include/linux/bio.h:25, from include/linux/blkdev.h:14, from kernel/sched.c:39: include/linux/ioprio.h: In function ‘task_ioprio’: include/linux/ioprio.h:50: warning: statement with no effect kernel/sched.c: In function ‘context_switch’: kernel/sched.c:1834: warning: statement with no effect Signed-off-by: Ralf Baechle Cc: Jeremy Fitzhardinge Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/bug.h | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/bug.h b/include/asm-generic/bug.h index 1d9573cf4a0b..c92ae0f166ff 100644 --- a/include/asm-generic/bug.h +++ b/include/asm-generic/bug.h @@ -37,7 +37,10 @@ #endif #ifndef HAVE_ARCH_WARN_ON -#define WARN_ON(condition) unlikely((condition)) +#define WARN_ON(condition) ({ \ + typeof(condition) __ret_warn_on = (condition); \ + unlikely(__ret_warn_on); \ +}) #endif #endif -- cgit v1.2.1 From 690a973f48b6ba2954465992c08e65059c8374fe Mon Sep 17 00:00:00 2001 From: Jan Beulich Date: Sat, 21 Oct 2006 18:37:01 +0200 Subject: [PATCH] x86-64: Speed up dwarf2 unwinder This changes the dwarf2 unwinder to do a binary search for CIEs instead of a linear work. The linker is unfortunately not able to build a proper lookup table at link time, instead it creates one at runtime as soon as the bootmem allocator is usable (so you'll continue using the linear lookup for the first [hopefully] few calls). The code should be ready to utilize a build-time created table once a fixed linker becomes available. Signed-off-by: Jan Beulich Signed-off-by: Andi Kleen --- include/asm-generic/vmlinux.lds.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 69240b52f8e1..9d0d11c180d9 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -125,6 +125,10 @@ *(__param) \ VMLINUX_SYMBOL(__stop___param) = .; \ } \ + \ + /* Unwind data binary search table */ \ + EH_FRAME_HDR \ + \ __end_rodata = .; \ . = ALIGN(4096); @@ -157,6 +161,18 @@ *(.kprobes.text) \ VMLINUX_SYMBOL(__kprobes_text_end) = .; +#ifdef CONFIG_STACK_UNWIND + /* Unwind data binary search table */ +#define EH_FRAME_HDR \ + .eh_frame_hdr : AT(ADDR(.eh_frame_hdr) - LOAD_OFFSET) { \ + VMLINUX_SYMBOL(__start_unwind_hdr) = .; \ + *(.eh_frame_hdr) \ + VMLINUX_SYMBOL(__end_unwind_hdr) = .; \ + } +#else +#define EH_FRAME_HDR +#endif + /* DWARF debug sections. Symbols in the DWARF debugging sections are relative to the beginning of the section so we begin them at 0. */ -- cgit v1.2.1 From 61ce1efe6e40233663d27ab8ac9ba9710eebcaad Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 27 Oct 2006 11:41:44 -0700 Subject: [PATCH] vmlinux.lds: consolidate initcall sections Add a vmlinux.lds.h helper macro for defining the eight-level initcall table, teach all the architectures to use it. This is a prerequisite for a patch which performs initcall synchronisation for multithreaded-probing. Cc: Greg KH Signed-off-by: Andrew Morton [ Added AVR32 as well ] Signed-off-by: Haavard Skinnemoen Signed-off-by: Linus Torvalds --- include/asm-generic/vmlinux.lds.h | 10 ++++++++++ 1 file changed, 10 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 9d0d11c180d9..e3e83bcaf710 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -213,3 +213,13 @@ #define NOTES \ .notes : { *(.note.*) } :note + +#define INITCALLS \ + *(.initcall1.init) \ + *(.initcall2.init) \ + *(.initcall3.init) \ + *(.initcall4.init) \ + *(.initcall5.init) \ + *(.initcall6.init) \ + *(.initcall7.init) + -- cgit v1.2.1 From 735a7ffb739b6efeaeb1e720306ba308eaaeb20e Mon Sep 17 00:00:00 2001 From: Andrew Morton Date: Fri, 27 Oct 2006 11:42:37 -0700 Subject: [PATCH] drivers: wait for threaded probes between initcall levels The multithreaded-probing code has a problem: after one initcall level (eg, core_initcall) has been processed, we will then start processing the next level (postcore_initcall) while the kernel threads which are handling core_initcall are still executing. This breaks the guarantees which the layered initcalls previously gave us. IOW, we want to be multithreaded _within_ an initcall level, but not between different levels. Fix that up by causing the probing code to wait for all outstanding probes at one level to complete before we start processing the next level. Cc: Greg KH Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/vmlinux.lds.h | 9 ++++++++- 1 file changed, 8 insertions(+), 1 deletion(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index e3e83bcaf710..9d873163a7ab 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -216,10 +216,17 @@ #define INITCALLS \ *(.initcall1.init) \ + *(.initcall1s.init) \ *(.initcall2.init) \ + *(.initcall2s.init) \ *(.initcall3.init) \ + *(.initcall3s.init) \ *(.initcall4.init) \ + *(.initcall4s.init) \ *(.initcall5.init) \ + *(.initcall5s.init) \ *(.initcall6.init) \ - *(.initcall7.init) + *(.initcall6s.init) \ + *(.initcall7.init) \ + *(.initcall7s.init) -- cgit v1.2.1 From b3438f8266cb1f5010085ac47d7ad6a36a212164 Mon Sep 17 00:00:00 2001 From: Linus Torvalds Date: Mon, 20 Nov 2006 11:47:18 -0800 Subject: Add "pure_initcall" for static variable initialization This is a quick hack to overcome the fact that SRCU currently does not allow static initializers, and we need to sometimes initialize those things before any other initializers (even "core" ones) can do so. Currently we don't allow this at all for modules, and the only user that needs is right now is cpufreq. As reported by Thomas Gleixner: "Commit b4dfdbb3c707474a2254c5b4d7e62be31a4b7da9 ("[PATCH] cpufreq: make the transition_notifier chain use SRCU breaks cpu frequency notification users, which register the callback > on core_init level." Cc: Thomas Gleixner Cc: Ingo Molnar Cc: Arjan van de Ven Cc: Andrew Morton , Signed-off-by: Linus Torvalds --- include/asm-generic/vmlinux.lds.h | 2 ++ 1 file changed, 2 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 9d873163a7ab..e60d6f21fa62 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -215,6 +215,8 @@ .notes : { *(.note.*) } :note #define INITCALLS \ + *(.initcall0.init) \ + *(.initcall0s.init) \ *(.initcall1.init) \ *(.initcall1s.init) \ *(.initcall2.init) \ -- cgit v1.2.1 From c6dbaef22a2f78700e242915a13218dd780c89ff Mon Sep 17 00:00:00 2001 From: Benjamin Herrenschmidt Date: Sat, 11 Nov 2006 17:18:39 +1100 Subject: Driver core: add dev_archdata to struct device Add arch specific dev_archdata to struct device Adds an arch specific struct dev_arch to struct device. This enables architecture to add specific fields to every device in the system, like DMA operation pointers, NUMA node ID, firmware specific data, etc... Signed-off-by: Benjamin Herrenschmidt Acked-by: Andi Kleen Acked-By: David Howells Signed-off-by: Greg Kroah-Hartman --- include/asm-generic/device.h | 12 ++++++++++++ 1 file changed, 12 insertions(+) create mode 100644 include/asm-generic/device.h (limited to 'include/asm-generic') diff --git a/include/asm-generic/device.h b/include/asm-generic/device.h new file mode 100644 index 000000000000..c17c9600f220 --- /dev/null +++ b/include/asm-generic/device.h @@ -0,0 +1,12 @@ +/* + * Arch specific extensions to struct device + * + * This file is released under the GPLv2 + */ +#ifndef _ASM_GENERIC_DEVICE_H +#define _ASM_GENERIC_DEVICE_H + +struct dev_archdata { +}; + +#endif /* _ASM_GENERIC_DEVICE_H */ -- cgit v1.2.1