From 1b08e907211cdc744f54871736005d9f3e7f182c Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Fri, 14 Sep 2012 18:52:10 +0200 Subject: uprobes: Kill UTASK_BP_HIT state Kill UTASK_BP_HIT state, it buys nothing but complicates the code. It is only used in uprobe_notify_resume() to decide who should be called, we can check utask->active_uprobe != NULL instead. And this allows us to simplify handle_swbp(), no need to clear utask->state. Likewise we could kill UTASK_SSTEP, but UTASK_BP_HIT is worse and imho should die. The problem is, it creates the special case when task->utask is NULL, we can't distinguish RUNNING and BP_HIT. With this patch utask == NULL always means RUNNING. Signed-off-by: Oleg Nesterov Acked-by: Srikar Dronamraju --- include/linux/uprobes.h | 1 - 1 file changed, 1 deletion(-) (limited to 'include') diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index e6f0331e3d45..18d839da6517 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -59,7 +59,6 @@ struct uprobe_consumer { #ifdef CONFIG_UPROBES enum uprobe_task_state { UTASK_RUNNING, - UTASK_BP_HIT, UTASK_SSTEP, UTASK_SSTEP_ACK, UTASK_SSTEP_TRAPPED, -- cgit v1.2.3 From cb9a19fe4aa51afa34786bd383e6614fa0083d58 Mon Sep 17 00:00:00 2001 From: Oleg Nesterov Date: Sun, 30 Sep 2012 20:11:45 +0200 Subject: uprobes: Introduce prepare_uprobe() Preparation. Extract the copy_insn/arch_uprobe_analyze_insn code from install_breakpoint() into the new helper, prepare_uprobe(). And move uprobe->flags defines from uprobes.h to uprobes.c, nobody else can use them anyway. Signed-off-by: Oleg Nesterov Acked-by: Srikar Dronamraju --- include/linux/uprobes.h | 10 ---------- 1 file changed, 10 deletions(-) (limited to 'include') diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index 18d839da6517..24594571c5a3 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -35,16 +35,6 @@ struct inode; # include #endif -/* flags that denote/change uprobes behaviour */ - -/* Have a copy of original instruction */ -#define UPROBE_COPY_INSN 0x1 - -/* Dont run handlers when first register/ last unregister in progress*/ -#define UPROBE_RUN_HANDLER 0x2 -/* Can skip singlestep */ -#define UPROBE_SKIP_SSTEP 0x4 - struct uprobe_consumer { int (*handler)(struct uprobe_consumer *self, struct pt_regs *regs); /* -- cgit v1.2.3 From 6863255bd0e48bc41ae5a066d5c771801e92735a Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Mon, 15 Oct 2012 14:52:41 +0200 Subject: cfg80211/mac80211: avoid state mishmash on deauth Avoid situation when we are on associate state in mac80211 and on disassociate state in cfg80211. This can results on crash during modules unload (like showed on this thread: http://marc.info/?t=134373976300001&r=1&w=2) and possibly other problems. Reported-by: Pedro Francisco Cc: stable@vger.kernel.org Signed-off-by: Stanislaw Gruszka Signed-off-by: Johannes Berg --- include/net/cfg80211.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/net/cfg80211.h b/include/net/cfg80211.h index 1b4989082244..f8cd4cf3fad8 100644 --- a/include/net/cfg80211.h +++ b/include/net/cfg80211.h @@ -1218,6 +1218,7 @@ struct cfg80211_deauth_request { const u8 *ie; size_t ie_len; u16 reason_code; + bool local_state_change; }; /** -- cgit v1.2.3 From 2f5f1ce90a5fa097372bb895452a718e4d33e4e3 Mon Sep 17 00:00:00 2001 From: Aaro Koskinen Date: Fri, 17 Aug 2012 14:47:30 +0300 Subject: spi: tsc2005: delete soon-obsolete e-mail address Delete soon-obsolete e-mail address. Signed-off-by: Aaro Koskinen Signed-off-by: Mark Brown --- include/linux/spi/tsc2005.h | 2 -- 1 file changed, 2 deletions(-) (limited to 'include') diff --git a/include/linux/spi/tsc2005.h b/include/linux/spi/tsc2005.h index d9b0c84220c7..8f721e465e05 100644 --- a/include/linux/spi/tsc2005.h +++ b/include/linux/spi/tsc2005.h @@ -3,8 +3,6 @@ * * Copyright (C) 2009-2010 Nokia Corporation * - * Contact: Aaro Koskinen - * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or -- cgit v1.2.3 From 9dbf8ccde1b810a59b684e1d1aec7f9d2d007162 Mon Sep 17 00:00:00 2001 From: Lars-Peter Clausen Date: Mon, 15 Oct 2012 10:35:00 +0100 Subject: iio: Add some helper macros for unit conversion Some datasheets use a different unit to specify the channel scale than what IIO expects it to be. This patch adds two helper macros which allow to convert units commonly used in datasheets to IIO units: * acceleration: g -> meter / second**2 * angular velocity: degree (/ second) -> rad (/ second) This makes it much more convenient to specify and also easier to verify a channel's scale attribute. Signed-off-by: Lars-Peter Clausen Signed-off-by: Jonathan Cameron --- include/linux/iio/iio.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include') diff --git a/include/linux/iio/iio.h b/include/linux/iio/iio.h index c0ae76ac4e0b..7806c24e5bc8 100644 --- a/include/linux/iio/iio.h +++ b/include/linux/iio/iio.h @@ -618,4 +618,20 @@ static inline struct dentry *iio_get_debugfs_dentry(struct iio_dev *indio_dev) }; #endif +/** + * IIO_DEGREE_TO_RAD() - Convert degree to rad + * @deg: A value in degree + * + * Returns the given value converted from degree to rad + */ +#define IIO_DEGREE_TO_RAD(deg) (((deg) * 314159ULL + 9000000ULL) / 18000000ULL) + +/** + * IIO_G_TO_M_S_2() - Convert g to meter / second**2 + * @g: A value in g + * + * Returns the given value converted from g to meter / second**2 + */ +#define IIO_G_TO_M_S_2(g) ((g) * 980665ULL / 100000ULL) + #endif /* _INDUSTRIAL_IO_H_ */ -- cgit v1.2.3 From e84fe8a138fb1aa7aec8ef2fafb312ea5eb0f3dd Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Wed, 17 Oct 2012 09:39:13 +0100 Subject: xen: XENMEM_translate_gpfn_list was remove ages ago and is unused. Signed-off-by: Ian Campbell Signed-off-by: Konrad Rzeszutek Wilk --- include/xen/interface/memory.h | 24 ++---------------------- 1 file changed, 2 insertions(+), 22 deletions(-) (limited to 'include') diff --git a/include/xen/interface/memory.h b/include/xen/interface/memory.h index b66d04ce6957..90712e2072d5 100644 --- a/include/xen/interface/memory.h +++ b/include/xen/interface/memory.h @@ -179,28 +179,8 @@ struct xen_add_to_physmap { }; DEFINE_GUEST_HANDLE_STRUCT(xen_add_to_physmap); -/* - * Translates a list of domain-specific GPFNs into MFNs. Returns a -ve error - * code on failure. This call only works for auto-translated guests. - */ -#define XENMEM_translate_gpfn_list 8 -struct xen_translate_gpfn_list { - /* Which domain to translate for? */ - domid_t domid; - - /* Length of list. */ - xen_ulong_t nr_gpfns; - - /* List of GPFNs to translate. */ - GUEST_HANDLE(ulong) gpfn_list; - - /* - * Output list to contain MFN translations. May be the same as the input - * list (in which case each input GPFN is overwritten with the output MFN). - */ - GUEST_HANDLE(ulong) mfn_list; -}; -DEFINE_GUEST_HANDLE_STRUCT(xen_translate_gpfn_list); +/*** REMOVED ***/ +/*#define XENMEM_translate_gpfn_list 8*/ /* * Returns the pseudo-physical memory map as it was when the domain -- cgit v1.2.3 From ef32f89298c094b6ed76c0c4981b7a51e939cb71 Mon Sep 17 00:00:00 2001 From: Ian Campbell Date: Wed, 17 Oct 2012 09:39:14 +0100 Subject: xen: grant: use xen_pfn_t type for frame_list. This correctly sizes it as 64 bit on ARM but leaves it as unsigned long on x86 (therefore no intended change on x86). The long and ulong guest handles are now unused (and a bit dangerous) so remove them. Acked-by: Stefano Stabellini Signed-off-by: Ian Campbell Signed-off-by: Konrad Rzeszutek Wilk --- include/xen/grant_table.h | 2 +- include/xen/interface/grant_table.h | 2 +- 2 files changed, 2 insertions(+), 2 deletions(-) (limited to 'include') diff --git a/include/xen/grant_table.h b/include/xen/grant_table.h index ba0d77529a29..962b7df5eabf 100644 --- a/include/xen/grant_table.h +++ b/include/xen/grant_table.h @@ -170,7 +170,7 @@ gnttab_set_unmap_op(struct gnttab_unmap_grant_ref *unmap, phys_addr_t addr, unmap->dev_bus_addr = 0; } -int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gframes, +int arch_gnttab_map_shared(xen_pfn_t *frames, unsigned long nr_gframes, unsigned long max_nr_gframes, void **__shared); int arch_gnttab_map_status(uint64_t *frames, unsigned long nr_gframes, diff --git a/include/xen/interface/grant_table.h b/include/xen/interface/grant_table.h index f9f8b975ae74..e40fae9bf11a 100644 --- a/include/xen/interface/grant_table.h +++ b/include/xen/interface/grant_table.h @@ -310,7 +310,7 @@ struct gnttab_setup_table { uint32_t nr_frames; /* OUT parameters. */ int16_t status; /* GNTST_* */ - GUEST_HANDLE(ulong) frame_list; + GUEST_HANDLE(xen_pfn_t) frame_list; }; DEFINE_GUEST_HANDLE_STRUCT(gnttab_setup_table); -- cgit v1.2.3 From 0cf6ad8a18f7f7bdbb81975188d9e0656ef277dd Mon Sep 17 00:00:00 2001 From: anish kumar Date: Thu, 30 Aug 2012 00:35:09 +0530 Subject: extcon: standard cable names definition and declaration changed With this change now individual drivers can use standard cable names as below: static const char *arizona_cable[] = { extcon_cable_name[EXTCON_USB], extcon_cable_name[EXTCON_USB_HOST], "CUSTOM_CABLE" NULL, } Signed-off-by: anish kumar Signed-off-by: MyungJoo Ham --- include/linux/extcon.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/extcon.h b/include/linux/extcon.h index 7443a560c9d0..2c26c14cd710 100644 --- a/include/linux/extcon.h +++ b/include/linux/extcon.h @@ -68,7 +68,7 @@ enum extcon_cable_name { EXTCON_VIDEO_OUT, EXTCON_MECHANICAL, }; -extern const char *extcon_cable_name[]; +extern const char extcon_cable_name[][CABLE_NAME_MAX + 1]; struct extcon_cable; -- cgit v1.2.3 From 6f73601efb35c7003f5c58c2bc6fd08f3652169c Mon Sep 17 00:00:00 2001 From: Yuchung Cheng Date: Fri, 19 Oct 2012 15:14:44 +0000 Subject: tcp: add SYN/data info to TCP_INFO Add a bit TCPI_OPT_SYN_DATA (32) to the socket option TCP_INFO:tcpi_options. It's set if the data in SYN (sent or received) is acked by SYN-ACK. Server or client application can use this information to check Fast Open success rate. Signed-off-by: Yuchung Cheng Acked-by: Neal Cardwell Acked-by: Eric Dumazet Signed-off-by: David S. Miller --- include/linux/tcp.h | 3 ++- include/uapi/linux/tcp.h | 1 + 2 files changed, 3 insertions(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/tcp.h b/include/linux/tcp.h index 8a7fc4be2d75..60b7aac15e0e 100644 --- a/include/linux/tcp.h +++ b/include/linux/tcp.h @@ -191,7 +191,8 @@ struct tcp_sock { u8 do_early_retrans:1,/* Enable RFC5827 early-retransmit */ early_retrans_delayed:1, /* Delayed ER timer installed */ syn_data:1, /* SYN includes data */ - syn_fastopen:1; /* SYN includes Fast Open option */ + syn_fastopen:1, /* SYN includes Fast Open option */ + syn_data_acked:1;/* data in SYN is acked by SYN-ACK */ /* RTT measurement */ u32 srtt; /* smoothed round trip time << 3 */ diff --git a/include/uapi/linux/tcp.h b/include/uapi/linux/tcp.h index c4b89a5cb7df..e962faa5ab0d 100644 --- a/include/uapi/linux/tcp.h +++ b/include/uapi/linux/tcp.h @@ -130,6 +130,7 @@ enum { #define TCPI_OPT_WSCALE 4 #define TCPI_OPT_ECN 8 /* ECN was negociated at TCP session init */ #define TCPI_OPT_ECN_SEEN 16 /* we received at least one packet with ECT */ +#define TCPI_OPT_SYN_DATA 32 /* SYN-ACK acked data in SYN sent or rcvd */ enum tcp_ca_state { TCP_CA_Open = 0, -- cgit v1.2.3 From f8457d574f680a98c77846a15df13086ab1ab426 Mon Sep 17 00:00:00 2001 From: Chanwoo Choi Date: Mon, 8 Oct 2012 14:41:49 +0900 Subject: extcon: MAX77693: Add platform data for MUIC device to initialize registers This patch add platform data for MUIC device to initialize register on probe() call because it should unmask interrupt mask register and initialize some register related to MUIC device. Signed-off-by: Chanwoo Choi Signed-off-by: Myungjoo Ham Signed-off-by: Kyungmin Park --- include/linux/mfd/max77693.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include') diff --git a/include/linux/mfd/max77693.h b/include/linux/mfd/max77693.h index 1d28ae90384e..fe03b2d35d4f 100644 --- a/include/linux/mfd/max77693.h +++ b/include/linux/mfd/max77693.h @@ -30,7 +30,20 @@ #ifndef __LINUX_MFD_MAX77693_H #define __LINUX_MFD_MAX77693_H +struct max77693_reg_data { + u8 addr; + u8 data; +}; + +struct max77693_muic_platform_data { + struct max77693_reg_data *init_data; + int num_init_data; +}; + struct max77693_platform_data { int wakeup; + + /* muic data */ + struct max77693_muic_platform_data *muic_data; }; #endif /* __LINUX_MFD_MAX77693_H */ -- cgit v1.2.3 From b6aa22db7857ab7ed042d6c56b800bfc727cfdff Mon Sep 17 00:00:00 2001 From: Alex Deucher Date: Tue, 16 Oct 2012 12:51:45 -0400 Subject: drm/radeon: add some new SI PCI ids Signed-off-by: Alex Deucher Cc: stable@vger.kernel.org --- include/drm/drm_pciids.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/drm/drm_pciids.h b/include/drm/drm_pciids.h index c78bb997e2c6..af1cbaf535ed 100644 --- a/include/drm/drm_pciids.h +++ b/include/drm/drm_pciids.h @@ -205,6 +205,8 @@ {0x1002, 0x6788, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ {0x1002, 0x678A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6790, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ + {0x1002, 0x6791, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ + {0x1002, 0x6792, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6798, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6799, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ {0x1002, 0x679A, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_TAHITI|RADEON_NEW_MEMMAP}, \ @@ -217,6 +219,7 @@ {0x1002, 0x6808, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6809, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6810, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ + {0x1002, 0x6811, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6816, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6817, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ {0x1002, 0x6818, PCI_ANY_ID, PCI_ANY_ID, 0, 0, CHIP_PITCAIRN|RADEON_NEW_MEMMAP}, \ -- cgit v1.2.3 From 6760bca9fd16256210f4922a3e9f067d2c7017d7 Mon Sep 17 00:00:00 2001 From: "Srivatsa S. Bhat" Date: Tue, 16 Oct 2012 13:28:10 +0530 Subject: perf, cpu hotplug: Run CPU_STARTING notifiers with irqs disabled The CPU_STARTING notifiers are supposed to be run with irqs disabled. But the perf_cpu_notifier() macro invokes them without doing that. Fix it. Signed-off-by: Srivatsa S. Bhat Reviewed-by: Paul E. McKenney Cc: peterz@infradead.org Cc: acme@ghostprotocols.net Link: http://lkml.kernel.org/r/20121016075809.3572.47848.stgit@srivatsabhat.in.ibm.com Signed-off-by: Ingo Molnar --- include/linux/perf_event.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 2e902359aee5..06478056da03 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -803,10 +803,13 @@ static inline void perf_event_task_tick(void) { } do { \ static struct notifier_block fn##_nb __cpuinitdata = \ { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ + unsigned long flags; \ fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ (void *)(unsigned long)smp_processor_id()); \ + local_irq_save(flags); \ fn(&fn##_nb, (unsigned long)CPU_STARTING, \ (void *)(unsigned long)smp_processor_id()); \ + local_irq_restore(flags); \ fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ (void *)(unsigned long)smp_processor_id()); \ register_cpu_notifier(&fn##_nb); \ -- cgit v1.2.3 From c13d38e4a1fd5dd07135403c613c8091af444169 Mon Sep 17 00:00:00 2001 From: "Srivatsa S. Bhat" Date: Tue, 16 Oct 2012 13:28:17 +0530 Subject: perf, cpu hotplug: Use cached value of smp_processor_id() The perf_cpu_notifier() macro invokes smp_processor_id() multiple times. Optimize it by using a local variable. Signed-off-by: Srivatsa S. Bhat Reviewed-by: Paul E. McKenney Cc: peterz@infradead.org Cc: acme@ghostprotocols.net Link: http://lkml.kernel.org/r/20121016075817.3572.76733.stgit@srivatsabhat.in.ibm.com Signed-off-by: Ingo Molnar --- include/linux/perf_event.h | 7 ++++--- 1 file changed, 4 insertions(+), 3 deletions(-) (limited to 'include') diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h index 06478056da03..6bfb2faa0b19 100644 --- a/include/linux/perf_event.h +++ b/include/linux/perf_event.h @@ -803,15 +803,16 @@ static inline void perf_event_task_tick(void) { } do { \ static struct notifier_block fn##_nb __cpuinitdata = \ { .notifier_call = fn, .priority = CPU_PRI_PERF }; \ + unsigned long cpu = smp_processor_id(); \ unsigned long flags; \ fn(&fn##_nb, (unsigned long)CPU_UP_PREPARE, \ - (void *)(unsigned long)smp_processor_id()); \ + (void *)(unsigned long)cpu); \ local_irq_save(flags); \ fn(&fn##_nb, (unsigned long)CPU_STARTING, \ - (void *)(unsigned long)smp_processor_id()); \ + (void *)(unsigned long)cpu); \ local_irq_restore(flags); \ fn(&fn##_nb, (unsigned long)CPU_ONLINE, \ - (void *)(unsigned long)smp_processor_id()); \ + (void *)(unsigned long)cpu); \ register_cpu_notifier(&fn##_nb); \ } while (0) -- cgit v1.2.3 From 6ede1fd3cb404c0016de6ac529df46d561bd558b Mon Sep 17 00:00:00 2001 From: Yinghai Lu Date: Mon, 22 Oct 2012 16:35:18 -0700 Subject: x86, mm: Trim memory in memblock to be page aligned We will not map partial pages, so need to make sure memblock allocation will not allocate those bytes out. Also we will use for_each_mem_pfn_range() to loop to map memory range to keep them consistent. Signed-off-by: Yinghai Lu Link: http://lkml.kernel.org/r/CAE9FiQVZirvaBMFYRfXMmWEcHbKSicQEHz4VAwUv0xFCk51ZNw@mail.gmail.com Acked-by: Jacob Shin Signed-off-by: H. Peter Anvin Cc: --- include/linux/memblock.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/memblock.h b/include/linux/memblock.h index 569d67d4243e..d452ee191066 100644 --- a/include/linux/memblock.h +++ b/include/linux/memblock.h @@ -57,6 +57,7 @@ int memblock_add(phys_addr_t base, phys_addr_t size); int memblock_remove(phys_addr_t base, phys_addr_t size); int memblock_free(phys_addr_t base, phys_addr_t size); int memblock_reserve(phys_addr_t base, phys_addr_t size); +void memblock_trim_memory(phys_addr_t align); #ifdef CONFIG_HAVE_MEMBLOCK_NODE_MAP void __next_mem_pfn_range(int *idx, int nid, unsigned long *out_start_pfn, -- cgit v1.2.3 From c0d2af637863940b1a4fb208224ca7acb905c39f Mon Sep 17 00:00:00 2001 From: Joe Perches Date: Thu, 18 Oct 2012 12:07:03 -0700 Subject: dynamic_debug: Remove unnecessary __used The __used attribute prevents gcc from eliminating unnecessary, otherwise optimized away, metadata for debugging logging messages. Remove the __used attribute. Signed-off-by: Joe Perches Acked-by: Jason Baron Signed-off-by: Greg Kroah-Hartman --- include/linux/dynamic_debug.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'include') diff --git a/include/linux/dynamic_debug.h b/include/linux/dynamic_debug.h index c18257b0fa72..6dd4787a798a 100644 --- a/include/linux/dynamic_debug.h +++ b/include/linux/dynamic_debug.h @@ -61,7 +61,7 @@ int __dynamic_netdev_dbg(struct _ddebug *descriptor, const char *fmt, ...); #define DEFINE_DYNAMIC_DEBUG_METADATA(name, fmt) \ - static struct _ddebug __used __aligned(8) \ + static struct _ddebug __aligned(8) \ __attribute__((section("__verbose"))) name = { \ .modname = KBUILD_MODNAME, \ .function = __func__, \ -- cgit v1.2.3 From 29fc7c5a4f516d388fb6e1f6d24bfb04b8093e54 Mon Sep 17 00:00:00 2001 From: Will Deacon Date: Thu, 25 Oct 2012 13:37:53 -0700 Subject: rbtree: include linux/compiler.h for definition of __always_inline rb_erase_augmented() is a static function annotated with __always_inline. This causes a compile failure when attempting to use the rbtree implementation as a library (e.g. kvm tool): rbtree_augmented.h:125:24: error: expected `=', `,', `;', `asm' or `__attribute__' before `void' Include linux/compiler.h in rbtree_augmented.h so that the __always_inline macro is resolved correctly. Signed-off-by: Will Deacon Cc: Pekka Enberg Reviewed-by: Michel Lespinasse Cc: Ingo Molnar Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/linux/rbtree_augmented.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include') diff --git a/include/linux/rbtree_augmented.h b/include/linux/rbtree_augmented.h index 214caa33433b..2ac60c9cf644 100644 --- a/include/linux/rbtree_augmented.h +++ b/include/linux/rbtree_augmented.h @@ -24,6 +24,7 @@ #ifndef _LINUX_RBTREE_AUGMENTED_H #define _LINUX_RBTREE_AUGMENTED_H +#include #include /* -- cgit v1.2.3 From 5c1eabe68501d1e1b1586c7f4c46cc531828c4ab Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Mon, 22 Oct 2012 19:37:47 -0400 Subject: percpu-rw-semaphores: use light/heavy barriers This patch introduces new barrier pair light_mb() and heavy_mb() for percpu rw semaphores. This patch fixes a bug in percpu-rw-semaphores where a barrier was missing in percpu_up_write. This patch improves performance on the read path of percpu-rw-semaphores: on non-x86 cpus, there was a smp_mb() in percpu_up_read. This patch changes it to a compiler barrier and removes the "#if defined(X86) ..." condition. From: Lai Jiangshan Signed-off-by: Mikulas Patocka Signed-off-by: Linus Torvalds --- include/linux/percpu-rwsem.h | 20 +++++++------------- 1 file changed, 7 insertions(+), 13 deletions(-) (limited to 'include') diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index cf80f7e5277f..18f35b54286c 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -12,6 +12,9 @@ struct percpu_rw_semaphore { struct mutex mtx; }; +#define light_mb() barrier() +#define heavy_mb() synchronize_sched() + static inline void percpu_down_read(struct percpu_rw_semaphore *p) { rcu_read_lock(); @@ -24,22 +27,12 @@ static inline void percpu_down_read(struct percpu_rw_semaphore *p) } this_cpu_inc(*p->counters); rcu_read_unlock(); + light_mb(); /* A, between read of p->locked and read of data, paired with D */ } static inline void percpu_up_read(struct percpu_rw_semaphore *p) { - /* - * On X86, write operation in this_cpu_dec serves as a memory unlock - * barrier (i.e. memory accesses may be moved before the write, but - * no memory accesses are moved past the write). - * On other architectures this may not be the case, so we need smp_mb() - * there. - */ -#if defined(CONFIG_X86) && (!defined(CONFIG_X86_PPRO_FENCE) && !defined(CONFIG_X86_OOSTORE)) - barrier(); -#else - smp_mb(); -#endif + light_mb(); /* B, between read of the data and write to p->counter, paired with C */ this_cpu_dec(*p->counters); } @@ -61,11 +54,12 @@ static inline void percpu_down_write(struct percpu_rw_semaphore *p) synchronize_rcu(); while (__percpu_count(p->counters)) msleep(1); - smp_rmb(); /* paired with smp_mb() in percpu_sem_up_read() */ + heavy_mb(); /* C, between read of p->counter and write to data, paired with B */ } static inline void percpu_up_write(struct percpu_rw_semaphore *p) { + heavy_mb(); /* D, between write to data and write to p->locked, paired with A */ p->locked = false; mutex_unlock(&p->mtx); } -- cgit v1.2.3 From 1bf11c53535ab87e3bf14ecdf6747bf46f601c5d Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Mon, 22 Oct 2012 19:39:16 -0400 Subject: percpu-rw-semaphores: use rcu_read_lock_sched Use rcu_read_lock_sched / rcu_read_unlock_sched / synchronize_sched instead of rcu_read_lock / rcu_read_unlock / synchronize_rcu. This is an optimization. The RCU-protected region is very small, so there will be no latency problems if we disable preempt in this region. So we use rcu_read_lock_sched / rcu_read_unlock_sched that translates to preempt_disable / preempt_disable. It is smaller (and supposedly faster) than preemptible rcu_read_lock / rcu_read_unlock. Signed-off-by: Mikulas Patocka Signed-off-by: Linus Torvalds --- include/linux/percpu-rwsem.h | 8 ++++---- 1 file changed, 4 insertions(+), 4 deletions(-) (limited to 'include') diff --git a/include/linux/percpu-rwsem.h b/include/linux/percpu-rwsem.h index 18f35b54286c..250a4acddb2b 100644 --- a/include/linux/percpu-rwsem.h +++ b/include/linux/percpu-rwsem.h @@ -17,16 +17,16 @@ struct percpu_rw_semaphore { static inline void percpu_down_read(struct percpu_rw_semaphore *p) { - rcu_read_lock(); + rcu_read_lock_sched(); if (unlikely(p->locked)) { - rcu_read_unlock(); + rcu_read_unlock_sched(); mutex_lock(&p->mtx); this_cpu_inc(*p->counters); mutex_unlock(&p->mtx); return; } this_cpu_inc(*p->counters); - rcu_read_unlock(); + rcu_read_unlock_sched(); light_mb(); /* A, between read of p->locked and read of data, paired with D */ } @@ -51,7 +51,7 @@ static inline void percpu_down_write(struct percpu_rw_semaphore *p) { mutex_lock(&p->mtx); p->locked = true; - synchronize_rcu(); + synchronize_sched(); /* make sure that all readers exit the rcu_read_lock_sched region */ while (__percpu_count(p->counters)) msleep(1); heavy_mb(); /* C, between read of p->counter and write to data, paired with B */ -- cgit v1.2.3