1. 23 6月, 2015 2 次提交
  2. 29 9月, 2013 1 次提交
    • E
      net: introduce SO_MAX_PACING_RATE · 62748f32
      Eric Dumazet 提交于
      As mentioned in commit afe4fd06 ("pkt_sched: fq: Fair Queue packet
      scheduler"), this patch adds a new socket option.
      
      SO_MAX_PACING_RATE offers the application the ability to cap the
      rate computed by transport layer. Value is in bytes per second.
      
      u32 val = 1000000;
      setsockopt(sockfd, SOL_SOCKET, SO_MAX_PACING_RATE, &val, sizeof(val));
      
      To be effectively paced, a flow must use FQ packet scheduler.
      
      Note that a packet scheduler takes into account the headers for its
      computations. The effective payload rate depends on MSS and retransmits
      if any.
      
      I chose to make this pacing rate a SOL_SOCKET option instead of a
      TCP one because this can be used by other protocols.
      Signed-off-by: NEric Dumazet <edumazet@google.com>
      Cc: Steinar H. Gunderson <sesse@google.com>
      Cc: Michael Kerrisk <mtk.manpages@gmail.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      62748f32
  3. 25 9月, 2013 1 次提交
  4. 17 9月, 2013 1 次提交
  5. 13 9月, 2013 1 次提交
  6. 11 7月, 2013 1 次提交
  7. 04 7月, 2013 5 次提交
    • J
      mm/h8300: prepare for removing num_physpages and simplify mem_init() · 27a59706
      Jiang Liu 提交于
      Prepare for removing num_physpages and simplify mem_init().
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      27a59706
    • J
      h8300: normalize global variables exported by vmlinux.lds · 5dd7cd11
      Jiang Liu 提交于
      Generate mandatory global variables __bss_start/__bss_stop in
      file vmlinux.lds.
      
      Also remove one unused declaration of _text.
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: Jiang Liu <jiang.liu@huawei.com>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      5dd7cd11
    • J
      mm: concentrate modification of totalram_pages into the mm core · 0c988534
      Jiang Liu 提交于
      Concentrate code to modify totalram_pages into the mm core, so the arch
      memory initialized code doesn't need to take care of it.  With these
      changes applied, only following functions from mm core modify global
      variable totalram_pages: free_bootmem_late(), free_all_bootmem(),
      free_all_bootmem_node(), adjust_managed_page_count().
      
      With this patch applied, it will be much more easier for us to keep
      totalram_pages and zone->managed_pages in consistence.
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      Acked-by: NDavid Howells <dhowells@redhat.com>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "Michael S. Tsirkin" <mst@redhat.com>
      Cc: <sworddragon2@aol.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Jianguo Wu <wujianguo@huawei.com>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wen Congyang <wency@cn.fujitsu.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      0c988534
    • J
      mm: enhance free_reserved_area() to support poisoning memory with zero · dbe67df4
      Jiang Liu 提交于
      Address more review comments from last round of code review.
      1) Enhance free_reserved_area() to support poisoning freed memory with
         pattern '0'. This could be used to get rid of poison_init_mem()
         on ARM64.
      2) A previous patch has disabled memory poison for initmem on s390
         by mistake, so restore to the original behavior.
      3) Remove redundant PAGE_ALIGN() when calling free_reserved_area().
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "Michael S. Tsirkin" <mst@redhat.com>
      Cc: <sworddragon2@aol.com>
      Cc: Arnd Bergmann <arnd@arndb.de>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Jianguo Wu <wujianguo@huawei.com>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wen Congyang <wency@cn.fujitsu.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      dbe67df4
    • J
      mm: change signature of free_reserved_area() to fix building warnings · 11199692
      Jiang Liu 提交于
      Change signature of free_reserved_area() according to Russell King's
      suggestion to fix following build warnings:
      
        arch/arm/mm/init.c: In function 'mem_init':
        arch/arm/mm/init.c:603:2: warning: passing argument 1 of 'free_reserved_area' makes integer from pointer without a cast [enabled by default]
          free_reserved_area(__va(PHYS_PFN_OFFSET), swapper_pg_dir, 0, NULL);
          ^
        In file included from include/linux/mman.h:4:0,
                         from arch/arm/mm/init.c:15:
        include/linux/mm.h:1301:22: note: expected 'long unsigned int' but argument is of type 'void *'
         extern unsigned long free_reserved_area(unsigned long start, unsigned long end,
      
         mm/page_alloc.c: In function 'free_reserved_area':
      >> mm/page_alloc.c:5134:3: warning: passing argument 1 of 'virt_to_phys' makes pointer from integer without a cast [enabled by default]
         In file included from arch/mips/include/asm/page.h:49:0,
                          from include/linux/mmzone.h:20,
                          from include/linux/gfp.h:4,
                          from include/linux/mm.h:8,
                          from mm/page_alloc.c:18:
         arch/mips/include/asm/io.h:119:29: note: expected 'const volatile void *' but argument is of type 'long unsigned int'
         mm/page_alloc.c: In function 'free_area_init_nodes':
         mm/page_alloc.c:5030:34: warning: array subscript is below array bounds [-Warray-bounds]
      
      Also address some minor code review comments.
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      Reported-by: NArnd Bergmann <arnd@arndb.de>
      Cc: "H. Peter Anvin" <hpa@zytor.com>
      Cc: "Michael S. Tsirkin" <mst@redhat.com>
      Cc: <sworddragon2@aol.com>
      Cc: Catalin Marinas <catalin.marinas@arm.com>
      Cc: Chris Metcalf <cmetcalf@tilera.com>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: Ingo Molnar <mingo@redhat.com>
      Cc: Jeremy Fitzhardinge <jeremy@goop.org>
      Cc: Jianguo Wu <wujianguo@huawei.com>
      Cc: Joonsoo Kim <js1304@gmail.com>
      Cc: Kamezawa Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
      Cc: Konrad Rzeszutek Wilk <konrad.wilk@oracle.com>
      Cc: Marek Szyprowski <m.szyprowski@samsung.com>
      Cc: Mel Gorman <mel@csn.ul.ie>
      Cc: Michel Lespinasse <walken@google.com>
      Cc: Minchan Kim <minchan@kernel.org>
      Cc: Rik van Riel <riel@redhat.com>
      Cc: Rusty Russell <rusty@rustcorp.com.au>
      Cc: Tang Chen <tangchen@cn.fujitsu.com>
      Cc: Tejun Heo <tj@kernel.org>
      Cc: Thomas Gleixner <tglx@linutronix.de>
      Cc: Wen Congyang <wency@cn.fujitsu.com>
      Cc: Will Deacon <will.deacon@arm.com>
      Cc: Yasuaki Ishimatsu <isimatu.yasuaki@jp.fujitsu.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Cc: Russell King <rmk@arm.linux.org.uk>
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      11199692
  8. 29 6月, 2013 1 次提交
  9. 23 6月, 2013 8 次提交
    • G
      h8300/boot: Use POSIX "$((..))" instead of bashism "$[...]" · fbc21c00
      Geert Uytterhoeven 提交于
      On Ubuntu, where /bin/sh -> dash, "make ARCH=h8300 clean" gives:
      
      printf: 1: $[0x00400000+0x00140000]: expected numeric value
      
      Replace the bash-specific "$[...]" by POSIX "$((..))" for arithmetic
      expansion to fix this.
      Note that according to the bash 4.1 manpage, "$[...]" is deprecated, and
      will be removed in upcoming versions of bash.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      fbc21c00
    • G
      h8300: Mark H83002 and H83048 CPU support broken · a4cb378f
      Geert Uytterhoeven 提交于
      arch/h8300/include/asm/io.h supports only H83007 (H8/3006,3007), H83068
      (H8/3065,3066,3067,3068,3069), and H8S2678 (H8S/2670,2673,2674R,2675,2676)
      CPU types.
      
      Hence disable H83002 (H8/3001,3002,3003) and H83048
      (H8/3044,3045,3046,3047,3048,3052) CPU support at the Kconfig level.
      
      This fixes build failures in allmodconfig/allyesconfig builds, as these
      always choose the first CPU type (H83002), which was unsupported:
      
      arch/h8300/include/asm/io.h:13:2: error: #error UNKNOWN CPU TYPE
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      a4cb378f
    • G
      h8300: Switch h8300 to drivers/Kconfig · 9ac6adbc
      Geert Uytterhoeven 提交于
      Convert the last remaining architecture to drivers/Kconfig.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      9ac6adbc
    • G
      h8300: Limit timer channel ranges in Kconfig · 4e8d1e48
      Geert Uytterhoeven 提交于
      arch/h8300/kernel/timer/itu.c and arch/h8300/kernel/timer/tpu.c
      only support 0--4 for CONFIG_H8300_ITU_CH resp. H8300_TPU_CH, hence limit
      them to that range in Kconfig.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      4e8d1e48
    • G
      h8300: Wire up asm-generic/xor.h · e71eccdb
      Geert Uytterhoeven 提交于
      crypto/xor.c:25:21: fatal error: asm/xor.h: No such file or directory
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      e71eccdb
    • G
      h8300: Fill the system call table using a CALL() macro · c9490255
      Geert Uytterhoeven 提交于
      The CALL() macro abstracts (a.o.) the underscore symbol prefix.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      c9490255
    • G
      h8300: Fix <asm/tlb.h> · 1e2b3bda
      Geert Uytterhoeven 提交于
      Ten years ago, a mismerge happened, concatenating two slightly different
      versions of the same file. As a consequence, <asm-generic/tlb.h> was never
      included, leading to a build failure only now:
      
      kernel/cpu/idle.c: In function 'cpu_idle_loop':
      kernel/cpu/idle.c:70:4: error: implicit declaration of function 'check_pgt_cache' [-Werror=implicit-function-declaration]
      
      Remove the duplicates, and the header comment with the no longer correct
      file name.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      Acked-by: NYoshinori Sato <ysato@users.sourceforge.jp>
      1e2b3bda
    • G
      h8300: Hardcode symbol prefixes in asm sources · db5ede6f
      Geert Uytterhoeven 提交于
      Commit e1b5bb6d ("consolidate cond_syscall
      and SYSCALL_ALIAS declarations") broke the h8300 build because it removed
      the duplicate SYMBOL_NAME() macro from arch/h8300/include/asm/linkage.h,
      and all the h8300 asm files include <asm/linkage.h> instead of
      <linux/linkage.h>:
      
          arch/h8300/kernel/entry.S: Assembler messages:
          arch/h8300/kernel/entry.S:158: Error: junk at end of line, first unrecognized character is `('
          ...
          arch/h8300/kernel/syscalls.S: Assembler messages:
          arch/h8300/kernel/syscalls.S:6: Error: junk at end of line, first unrecognized character is `('
          ...
          arch/h8300/lib/abs.S: Assembler messages:
          arch/h8300/lib/abs.S:12: Error: junk at end of line, first unrecognized character is `('
          ...
          arch/h8300/lib/memcpy.S: Assembler messages:
          arch/h8300/lib/memcpy.S:13: Error: junk at end of line, first unrecognized character is `('
          ...
          arch/h8300/lib/memset.S: Assembler messages:
          arch/h8300/lib/memset.S:13: Error: junk at end of line, first unrecognized character is `('
          ...
      
      Commit 126de6b2 ("linkage.h: fix build
      breakage due to symbol prefix handling") broke it even more, by removing
      SYMBOL_NAME() and replacing it by __SYMBOL_NAME().
      
      Commit f8ce1faf ("Merge tag
      'modules-next-for-linus' of
      git://git.kernel.org/pub/scm/linuxkernel/git/rusty/linux")
      also removed __SYMBOL_NAME(), hidden in a merge conflict resolution.
      
      Hence, replace the use of SYMBOL_NAME() and SYMBOL_NAME_LABEL() in h8300
      assembler sources by hardcoding the underscore symbol prefix, like other
      architectures (blackfin/metag) do.
      
      This allows to kill SYMBOL_NAME_LABEL(). Now <asm/linkage.h> becomes empty,
      and h8300 can be switched to asm-generic/linkage.h.
      Signed-off-by: NGeert Uytterhoeven <geert@linux-m68k.org>
      db5ede6f
  10. 18 6月, 2013 1 次提交
  11. 16 6月, 2013 1 次提交
    • J
      h8300: add missing definition for read_barries_depends() · c805a5b7
      Jiang Liu 提交于
      Add missing definition for read_barries_depends() for h8300 to fix error:
      kernel/task_work.c: In function 'task_work_cancel':
      kernel/task_work.c:38:3: error: implicit declaration of function 'read_barrier_depends' [-Werror=implicit-function-declaration]
      cc1: some warnings being treated as errors
      make[1]: *** [kernel/task_work.o] Error 1
      make: *** [kernel] Error 2
      
      Cc: Yoshinori Sato <ysato@users.sourceforge.jp>
      Cc: David Howells <dhowells@redhat.com>
      Cc: Geert Uytterhoeven <geert@linux-m68k.org>
      Cc: linux-kernel@vger.kernel.org
      Signed-off-by: NJiang Liu <jiang.liu@huawei.com>
      c805a5b7
  12. 05 5月, 2013 1 次提交
  13. 01 5月, 2013 2 次提交
    • T
      dump_stack: unify debug information printed by show_regs() · a43cb95d
      Tejun Heo 提交于
      show_regs() is inherently arch-dependent but it does make sense to print
      generic debug information and some archs already do albeit in slightly
      different forms.  This patch introduces a generic function to print debug
      information from show_regs() so that different archs print out the same
      information and it's much easier to modify what's printed.
      
      show_regs_print_info() prints out the same debug info as dump_stack()
      does plus task and thread_info pointers.
      
      * Archs which didn't print debug info now do.
      
        alpha, arc, blackfin, c6x, cris, frv, h8300, hexagon, ia64, m32r,
        metag, microblaze, mn10300, openrisc, parisc, score, sh64, sparc,
        um, xtensa
      
      * Already prints debug info.  Replaced with show_regs_print_info().
        The printed information is superset of what used to be there.
      
        arm, arm64, avr32, mips, powerpc, sh32, tile, unicore32, x86
      
      * s390 is special in that it used to print arch-specific information
        along with generic debug info.  Heiko and Martin think that the
        arch-specific extra isn't worth keeping s390 specfic implementation.
        Converted to use the generic version.
      
      Note that now all archs print the debug info before actual register
      dumps.
      
      An example BUG() dump follows.
      
       kernel BUG at /work/os/work/kernel/workqueue.c:4841!
       invalid opcode: 0000 [#1] PREEMPT SMP DEBUG_PAGEALLOC
       Modules linked in:
       CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #7
       Hardware name: empty empty/S3992, BIOS 080011  10/26/2007
       task: ffff88007c85e040 ti: ffff88007c860000 task.ti: ffff88007c860000
       RIP: 0010:[<ffffffff8234a07e>]  [<ffffffff8234a07e>] init_workqueues+0x4/0x6
       RSP: 0000:ffff88007c861ec8  EFLAGS: 00010246
       RAX: ffff88007c861fd8 RBX: ffffffff824466a8 RCX: 0000000000000001
       RDX: 0000000000000046 RSI: 0000000000000001 RDI: ffffffff8234a07a
       RBP: ffff88007c861ec8 R08: 0000000000000000 R09: 0000000000000000
       R10: 0000000000000001 R11: 0000000000000000 R12: ffffffff8234a07a
       R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
       FS:  0000000000000000(0000) GS:ffff88007dc00000(0000) knlGS:0000000000000000
       CS:  0010 DS: 0000 ES: 0000 CR0: 000000008005003b
       CR2: ffff88015f7ff000 CR3: 00000000021f1000 CR4: 00000000000007f0
       DR0: 0000000000000000 DR1: 0000000000000000 DR2: 0000000000000000
       DR3: 0000000000000000 DR6: 00000000ffff0ff0 DR7: 0000000000000400
       Stack:
        ffff88007c861ef8 ffffffff81000312 ffffffff824466a8 ffff88007c85e650
        0000000000000003 0000000000000000 ffff88007c861f38 ffffffff82335e5d
        ffff88007c862080 ffffffff8223d8c0 ffff88007c862080 ffffffff81c47760
       Call Trace:
        [<ffffffff81000312>] do_one_initcall+0x122/0x170
        [<ffffffff82335e5d>] kernel_init_freeable+0x9b/0x1c8
        [<ffffffff81c47760>] ? rest_init+0x140/0x140
        [<ffffffff81c4776e>] kernel_init+0xe/0xf0
        [<ffffffff81c6be9c>] ret_from_fork+0x7c/0xb0
        [<ffffffff81c47760>] ? rest_init+0x140/0x140
        ...
      
      v2: Typo fix in x86-32.
      
      v3: CPU number dropped from show_regs_print_info() as
          dump_stack_print_info() has been updated to print it.  s390
          specific implementation dropped as requested by s390 maintainers.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Acked-by: NDavid S. Miller <davem@davemloft.net>
      Acked-by: NJesper Nilsson <jesper.nilsson@axis.com>
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Martin Schwidefsky <schwidefsky@de.ibm.com>
      Cc: Bjorn Helgaas <bhelgaas@google.com>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Mike Frysinger <vapier@gentoo.org>
      Cc: Vineet Gupta <vgupta@synopsys.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Acked-by: Chris Metcalf <cmetcalf@tilera.com>		[tile bits]
      Acked-by: Richard Kuo <rkuo@codeaurora.org>		[hexagon bits]
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      a43cb95d
    • T
      dump_stack: consolidate dump_stack() implementations and unify their behaviors · 196779b9
      Tejun Heo 提交于
      Both dump_stack() and show_stack() are currently implemented by each
      architecture.  show_stack(NULL, NULL) dumps the backtrace for the
      current task as does dump_stack().  On some archs, dump_stack() prints
      extra information - pid, utsname and so on - in addition to the
      backtrace while the two are identical on other archs.
      
      The usages in arch-independent code of the two functions indicate
      show_stack(NULL, NULL) should print out bare backtrace while
      dump_stack() is used for debugging purposes when something went wrong,
      so it does make sense to print additional information on the task which
      triggered dump_stack().
      
      There's no reason to require archs to implement two separate but mostly
      identical functions.  It leads to unnecessary subtle information.
      
      This patch expands the dummy fallback dump_stack() implementation in
      lib/dump_stack.c such that it prints out debug information (taken from
      x86) and invokes show_stack(NULL, NULL) and drops arch-specific
      dump_stack() implementations in all archs except blackfin.  Blackfin's
      dump_stack() does something wonky that I don't understand.
      
      Debug information can be printed separately by calling
      dump_stack_print_info() so that arch-specific dump_stack()
      implementation can still emit the same debug information.  This is used
      in blackfin.
      
      This patch brings the following behavior changes.
      
      * On some archs, an extra level in backtrace for show_stack() could be
        printed.  This is because the top frame was determined in
        dump_stack() on those archs while generic dump_stack() can't do that
        reliably.  It can be compensated by inlining dump_stack() but not
        sure whether that'd be necessary.
      
      * Most archs didn't use to print debug info on dump_stack().  They do
        now.
      
      An example WARN dump follows.
      
       WARNING: at kernel/workqueue.c:4841 init_workqueues+0x35/0x505()
       Hardware name: empty
       Modules linked in:
       CPU: 0 PID: 1 Comm: swapper/0 Not tainted 3.9.0-rc1-work+ #9
        0000000000000009 ffff88007c861e08 ffffffff81c614dc ffff88007c861e48
        ffffffff8108f50f ffffffff82228240 0000000000000040 ffffffff8234a03c
        0000000000000000 0000000000000000 0000000000000000 ffff88007c861e58
       Call Trace:
        [<ffffffff81c614dc>] dump_stack+0x19/0x1b
        [<ffffffff8108f50f>] warn_slowpath_common+0x7f/0xc0
        [<ffffffff8108f56a>] warn_slowpath_null+0x1a/0x20
        [<ffffffff8234a071>] init_workqueues+0x35/0x505
        ...
      
      v2: CPU number added to the generic debug info as requested by s390
          folks and dropped the s390 specific dump_stack().  This loses %ksp
          from the debug message which the maintainers think isn't important
          enough to keep the s390-specific dump_stack() implementation.
      
          dump_stack_print_info() is moved to kernel/printk.c from
          lib/dump_stack.c.  Because linkage is per objecct file,
          dump_stack_print_info() living in the same lib file as generic
          dump_stack() means that archs which implement custom dump_stack()
          - at this point, only blackfin - can't use dump_stack_print_info()
          as that will bring in the generic version of dump_stack() too.  v1
          The v1 patch broke build on blackfin due to this issue.  The build
          breakage was reported by Fengguang Wu.
      Signed-off-by: NTejun Heo <tj@kernel.org>
      Acked-by: NDavid S. Miller <davem@davemloft.net>
      Acked-by: NVineet Gupta <vgupta@synopsys.com>
      Acked-by: NJesper Nilsson <jesper.nilsson@axis.com>
      Acked-by: NVineet Gupta <vgupta@synopsys.com>
      Acked-by: Martin Schwidefsky <schwidefsky@de.ibm.com>	[s390 bits]
      Cc: Heiko Carstens <heiko.carstens@de.ibm.com>
      Cc: Mike Frysinger <vapier@gentoo.org>
      Cc: Fengguang Wu <fengguang.wu@intel.com>
      Cc: Bjorn Helgaas <bhelgaas@google.com>
      Cc: Sam Ravnborg <sam@ravnborg.org>
      Acked-by: Richard Kuo <rkuo@codeaurora.org>		[hexagon bits]
      Signed-off-by: NAndrew Morton <akpm@linux-foundation.org>
      Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
      196779b9
  14. 30 4月, 2013 2 次提交
  15. 17 4月, 2013 1 次提交
  16. 10 4月, 2013 1 次提交
  17. 08 4月, 2013 1 次提交
  18. 01 4月, 2013 1 次提交
    • K
      net: add option to enable error queue packets waking select · 7d4c04fc
      Keller, Jacob E 提交于
      Currently, when a socket receives something on the error queue it only wakes up
      the socket on select if it is in the "read" list, that is the socket has
      something to read. It is useful also to wake the socket if it is in the error
      list, which would enable software to wait on error queue packets without waking
      up for regular data on the socket. The main use case is for receiving
      timestamped transmit packets which return the timestamp to the socket via the
      error queue. This enables an application to select on the socket for the error
      queue only instead of for the regular traffic.
      
      -v2-
      * Added the SO_SELECT_ERR_QUEUE socket option to every architechture specific file
      * Modified every socket poll function that checks error queue
      Signed-off-by: NJacob Keller <jacob.e.keller@intel.com>
      Cc: Jeffrey Kirsher <jeffrey.t.kirsher@intel.com>
      Cc: Richard Cochran <richardcochran@gmail.com>
      Cc: Matthew Vick <matthew.vick@intel.com>
      Signed-off-by: NDavid S. Miller <davem@davemloft.net>
      7d4c04fc
  19. 15 3月, 2013 1 次提交
    • R
      CONFIG_SYMBOL_PREFIX: cleanup. · b92021b0
      Rusty Russell 提交于
      We have CONFIG_SYMBOL_PREFIX, which three archs define to the string
      "_".  But Al Viro broke this in "consolidate cond_syscall and
      SYSCALL_ALIAS declarations" (in linux-next), and he's not the first to
      do so.
      
      Using CONFIG_SYMBOL_PREFIX is awkward, since we usually just want to
      prefix it so something.  So various places define helpers which are
      defined to nothing if CONFIG_SYMBOL_PREFIX isn't set:
      
      1) include/asm-generic/unistd.h defines __SYMBOL_PREFIX.
      2) include/asm-generic/vmlinux.lds.h defines VMLINUX_SYMBOL(sym)
      3) include/linux/export.h defines MODULE_SYMBOL_PREFIX.
      4) include/linux/kernel.h defines SYMBOL_PREFIX (which differs from #7)
      5) kernel/modsign_certificate.S defines ASM_SYMBOL(sym)
      6) scripts/modpost.c defines MODULE_SYMBOL_PREFIX
      7) scripts/Makefile.lib defines SYMBOL_PREFIX on the commandline if
         CONFIG_SYMBOL_PREFIX is set, so that we have a non-string version
         for pasting.
      
      (arch/h8300/include/asm/linkage.h defines SYMBOL_NAME(), too).
      
      Let's solve this properly:
      1) No more generic prefix, just CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX.
      2) Make linux/export.h usable from asm.
      3) Define VMLINUX_SYMBOL() and VMLINUX_SYMBOL_STR().
      4) Make everyone use them.
      Signed-off-by: NRusty Russell <rusty@rustcorp.com.au>
      Reviewed-by: NJames Hogan <james.hogan@imgtec.com>
      Tested-by: James Hogan <james.hogan@imgtec.com> (metag)
      b92021b0
  20. 13 3月, 2013 1 次提交
  21. 04 3月, 2013 1 次提交
  22. 28 2月, 2013 1 次提交
  23. 26 2月, 2013 1 次提交
  24. 14 2月, 2013 1 次提交
    • A
      burying unused conditionals · d64008a8
      Al Viro 提交于
      __ARCH_WANT_SYS_RT_SIGACTION,
      __ARCH_WANT_SYS_RT_SIGSUSPEND,
      __ARCH_WANT_COMPAT_SYS_RT_SIGSUSPEND,
      __ARCH_WANT_COMPAT_SYS_SCHED_RR_GET_INTERVAL - not used anymore
      CONFIG_GENERIC_{SIGALTSTACK,COMPAT_RT_SIG{ACTION,QUEUEINFO,PENDING,PROCMASK}} -
      can be assumed always set.
      d64008a8
  25. 04 2月, 2013 2 次提交