From a42548a18866e87092db93b771e6c5b060d78401 Mon Sep 17 00:00:00 2001 From: Stanislaw Gruszka Date: Wed, 29 Jul 2009 12:15:29 +0200 Subject: cputime: Optimize jiffies_to_cputime(1) For powerpc with CONFIG_VIRT_CPU_ACCOUNTING jiffies_to_cputime(1) is not compile time constant and run time calculations are quite expensive. To optimize we use precomputed value. For all other architectures is is preprocessor definition. Signed-off-by: Stanislaw Gruszka Acked-by: Peter Zijlstra Acked-by: Thomas Gleixner Cc: Oleg Nesterov Cc: Andrew Morton Cc: Paul Mackerras Cc: Benjamin Herrenschmidt LKML-Reference: <1248862529-6063-5-git-send-email-sgruszka@redhat.com> Signed-off-by: Ingo Molnar --- include/asm-generic/cputime.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/cputime.h b/include/asm-generic/cputime.h index 1c1fa422d18..ca0f239f0e1 100644 --- a/include/asm-generic/cputime.h +++ b/include/asm-generic/cputime.h @@ -7,6 +7,7 @@ typedef unsigned long cputime_t; #define cputime_zero (0UL) +#define cputime_one_jiffy jiffies_to_cputime(1) #define cputime_max ((~0UL >> 1) - 1) #define cputime_add(__a, __b) ((__a) + (__b)) #define cputime_sub(__a, __b) ((__a) - (__b)) -- cgit From ad5fa913991e9e0f122b021e882b0d50051fbdbc Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 16 Sep 2009 11:50:06 +0200 Subject: HWPOISON: Add new SIGBUS error codes for hardware poison signals Add new SIGBUS codes for reporting machine checks as signals. When the hardware detects an uncorrected ECC error it can trigger these signals. This is needed for telling KVM's qemu about machine checks that happen to guests, so that it can inject them, but might be also useful for other programs. I find it useful in my test programs. This patch merely defines the new types. - Define two new si_codes for SIGBUS. BUS_MCEERR_AO and BUS_MCEERR_AR * BUS_MCEERR_AO is for "Action Optional" machine checks, which means that some corruption has been detected in the background, but nothing has been consumed so far. The program can ignore those if it wants (but most programs would already get killed) * BUS_MCEERR_AR is for "Action Required" machine checks. This happens when corrupted data is consumed or the application ran into an area which has been known to be corrupted earlier. These require immediate action and cannot just returned to. Most programs would kill themselves. - They report the address of the corruption in the user address space in si_addr. - Define a new si_addr_lsb field that reports the extent of the corruption to user space. That's currently always a (small) page. The user application cannot tell where in this page the corruption happened. AK: I plan to write a man page update before anyone asks. Signed-off-by: Andi Kleen --- include/asm-generic/siginfo.h | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/siginfo.h b/include/asm-generic/siginfo.h index c840719a8c5..942d30b5aab 100644 --- a/include/asm-generic/siginfo.h +++ b/include/asm-generic/siginfo.h @@ -82,6 +82,7 @@ typedef struct siginfo { #ifdef __ARCH_SI_TRAPNO int _trapno; /* TRAP # which caused the signal */ #endif + short _addr_lsb; /* LSB of the reported address */ } _sigfault; /* SIGPOLL */ @@ -112,6 +113,7 @@ typedef struct siginfo { #ifdef __ARCH_SI_TRAPNO #define si_trapno _sifields._sigfault._trapno #endif +#define si_addr_lsb _sifields._sigfault._addr_lsb #define si_band _sifields._sigpoll._band #define si_fd _sifields._sigpoll._fd @@ -192,7 +194,11 @@ typedef struct siginfo { #define BUS_ADRALN (__SI_FAULT|1) /* invalid address alignment */ #define BUS_ADRERR (__SI_FAULT|2) /* non-existant physical address */ #define BUS_OBJERR (__SI_FAULT|3) /* object specific hardware error */ -#define NSIGBUS 3 +/* hardware memory error consumed on a machine check: action required */ +#define BUS_MCEERR_AR (__SI_FAULT|4) +/* hardware memory error detected in process but not consumed: action optional*/ +#define BUS_MCEERR_AO (__SI_FAULT|5) +#define NSIGBUS 5 /* * SIGTRAP si_codes -- cgit From 9893e49d64a4874ea67849ee2cfbf3f3d6817573 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Wed, 16 Sep 2009 11:50:17 +0200 Subject: HWPOISON: Add madvise() based injector for hardware poisoned pages v4 Impact: optional, useful for debugging Add a new madvice sub command to inject poison for some pages in a process' address space. This is useful for testing the poison page handling. This patch can allow root to tie up large amounts of memory. I got feedback from container developers and they didn't see any problem. v2: Use write flag for get_user_pages to make sure to always get a fresh page v3: Don't request write mapping (Fengguang Wu) v4: Move MADV_* number to avoid conflict with KSM (Hugh Dickins) Signed-off-by: Andi Kleen --- include/asm-generic/mman-common.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h index 3b69ad34189..c325d1ef42a 100644 --- a/include/asm-generic/mman-common.h +++ b/include/asm-generic/mman-common.h @@ -34,6 +34,7 @@ #define MADV_REMOVE 9 /* remove these pages & resources */ #define MADV_DONTFORK 10 /* don't inherit across fork */ #define MADV_DOFORK 11 /* do inherit across fork */ +#define MADV_HWPOISON 100 /* poison a page for testing */ /* compatibility flags */ #define MAP_FILE 0 -- cgit From cdd6c482c9ff9c55475ee7392ec8f672eddb7be6 Mon Sep 17 00:00:00 2001 From: Ingo Molnar Date: Mon, 21 Sep 2009 12:02:48 +0200 Subject: perf: Do the big rename: Performance Counters -> Performance Events Bye-bye Performance Counters, welcome Performance Events! In the past few months the perfcounters subsystem has grown out its initial role of counting hardware events, and has become (and is becoming) a much broader generic event enumeration, reporting, logging, monitoring, analysis facility. Naming its core object 'perf_counter' and naming the subsystem 'perfcounters' has become more and more of a misnomer. With pending code like hw-breakpoints support the 'counter' name is less and less appropriate. All in one, we've decided to rename the subsystem to 'performance events' and to propagate this rename through all fields, variables and API names. (in an ABI compatible fashion) The word 'event' is also a bit shorter than 'counter' - which makes it slightly more convenient to write/handle as well. Thanks goes to Stephane Eranian who first observed this misnomer and suggested a rename. User-space tooling and ABI compatibility is not affected - this patch should be function-invariant. (Also, defconfigs were not touched to keep the size down.) This patch has been generated via the following script: FILES=$(find * -type f | grep -vE 'oprofile|[^K]config') sed -i \ -e 's/PERF_EVENT_/PERF_RECORD_/g' \ -e 's/PERF_COUNTER/PERF_EVENT/g' \ -e 's/perf_counter/perf_event/g' \ -e 's/nb_counters/nb_events/g' \ -e 's/swcounter/swevent/g' \ -e 's/tpcounter_event/tp_event/g' \ $FILES for N in $(find . -name perf_counter.[ch]); do M=$(echo $N | sed 's/perf_counter/perf_event/g') mv $N $M done FILES=$(find . -name perf_event.*) sed -i \ -e 's/COUNTER_MASK/REG_MASK/g' \ -e 's/COUNTER/EVENT/g' \ -e 's/\/event_id/g' \ -e 's/counter/event/g' \ -e 's/Counter/Event/g' \ $FILES ... to keep it as correct as possible. This script can also be used by anyone who has pending perfcounters patches - it converts a Linux kernel tree over to the new naming. We tried to time this change to the point in time where the amount of pending patches is the smallest: the end of the merge window. Namespace clashes were fixed up in a preparatory patch - and some stylistic fallout will be fixed up in a subsequent patch. ( NOTE: 'counters' are still the proper terminology when we deal with hardware registers - and these sed scripts are a bit over-eager in renaming them. I've undone some of that, but in case there's something left where 'counter' would be better than 'event' we can undo that on an individual basis instead of touching an otherwise nicely automated patch. ) Suggested-by: Stephane Eranian Acked-by: Peter Zijlstra Acked-by: Paul Mackerras Reviewed-by: Arjan van de Ven Cc: Mike Galbraith Cc: Arnaldo Carvalho de Melo Cc: Frederic Weisbecker Cc: Steven Rostedt Cc: Benjamin Herrenschmidt Cc: David Howells Cc: Kyle McMartin Cc: Martin Schwidefsky Cc: "David S. Miller" Cc: Thomas Gleixner Cc: "H. Peter Anvin" Cc: LKML-Reference: Signed-off-by: Ingo Molnar --- include/asm-generic/unistd.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/unistd.h b/include/asm-generic/unistd.h index 1125e5a1ee5..d76b66acea9 100644 --- a/include/asm-generic/unistd.h +++ b/include/asm-generic/unistd.h @@ -620,8 +620,8 @@ __SYSCALL(__NR_move_pages, sys_move_pages) #define __NR_rt_tgsigqueueinfo 240 __SYSCALL(__NR_rt_tgsigqueueinfo, sys_rt_tgsigqueueinfo) -#define __NR_perf_counter_open 241 -__SYSCALL(__NR_perf_counter_open, sys_perf_counter_open) +#define __NR_perf_event_open 241 +__SYSCALL(__NR_perf_event_open, sys_perf_event_open) #undef __NR_syscalls #define __NR_syscalls 242 -- cgit From d19f352484467a5e518639ddff0554669c10ffab Mon Sep 17 00:00:00 2001 From: Hugh Dickins Date: Mon, 21 Sep 2009 17:01:53 -0700 Subject: ksm: define MADV_MERGEABLE and MADV_UNMERGEABLE The out-of-tree KSM used ioctls on fds cloned from /dev/ksm to register a memory area for merging: we prefer now to use an madvise(2) interface. This patch just defines MADV_MERGEABLE (to tell KSM it may merge pages in this area found identical to pages in other mergeable areas) and MADV_UNMERGEABLE (to undo that). Most architectures use asm-generic, but alpha, mips, parisc, xtensa need their own definitions: included here for mmotm convenience, but we'll probably want to split this and feed pieces to arch maintainers. Based upon earlier patches by Chris Wright and Izik Eidus. Signed-off-by: Hugh Dickins Signed-off-by: Chris Wright Signed-off-by: Izik Eidus Cc: Michael Kerrisk Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Ralf Baechle Cc: Kyle McMartin Cc: Helge Deller Cc: Chris Zankel Cc: Andrea Arcangeli Cc: Rik van Riel Cc: Wu Fengguang Cc: Balbir Singh Cc: Hugh Dickins Cc: KAMEZAWA Hiroyuki Cc: Lee Schermerhorn Cc: Avi Kivity Cc: Nick Piggin Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/mman-common.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/mman-common.h b/include/asm-generic/mman-common.h index 3b69ad34189..dd63bd38864 100644 --- a/include/asm-generic/mman-common.h +++ b/include/asm-generic/mman-common.h @@ -35,6 +35,9 @@ #define MADV_DONTFORK 10 /* don't inherit across fork */ #define MADV_DOFORK 11 /* do inherit across fork */ +#define MADV_MERGEABLE 12 /* KSM may merge identical pages */ +#define MADV_UNMERGEABLE 13 /* KSM may not merge identical pages */ + /* compatibility flags */ #define MAP_FILE 0 -- cgit From 90f72aa58bbf076b68e289fbd71eb829bc505923 Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 21 Sep 2009 17:03:45 -0700 Subject: mm: add MAP_HUGETLB for mmaping pseudo-anonymous huge page regions Add a flag for mmap that will be used to request a huge page region that will look like anonymous memory to user space. This is accomplished by using a file on the internal vfsmount. MAP_HUGETLB is a modifier of MAP_ANONYMOUS and so must be specified with it. The region will behave the same as a MAP_ANONYMOUS region using small pages. The patch also adds the MAP_STACK flag, which was previously defined only on some architectures but not on others. Since MAP_STACK is meant to be a hint only, architectures can define it without assigning a specific meaning to it. Signed-off-by: Arnd Bergmann Cc: Eric B Munson Cc: Hugh Dickins Cc: David Rientjes Cc: Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/mman.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/mman.h b/include/asm-generic/mman.h index 7cab4de2bca..32c8bd6a196 100644 --- a/include/asm-generic/mman.h +++ b/include/asm-generic/mman.h @@ -11,6 +11,7 @@ #define MAP_POPULATE 0x8000 /* populate (prefault) pagetables */ #define MAP_NONBLOCK 0x10000 /* do not block on IO */ #define MAP_STACK 0x20000 /* give out an address that is best suited for process/thread stacks */ +#define MAP_HUGETLB 0x40000 /* create a huge page mapping */ #define MCL_CURRENT 1 /* lock all current mappings */ #define MCL_FUTURE 2 /* lock all future mappings */ -- cgit From 268e46712d57a6493cc0f98e7d200a0f674c31ed Mon Sep 17 00:00:00 2001 From: Roland McGrath Date: Tue, 22 Sep 2009 19:56:50 -0700 Subject: asm-generic: syscall_get_nr returns int Only 32 bits of system call number are meaningful, so make the specification for syscall_get_nr() be to return int, not long. Signed-off-by: Roland McGrath --- include/asm-generic/syscall.h | 8 ++++++-- 1 file changed, 6 insertions(+), 2 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/syscall.h b/include/asm-generic/syscall.h index ea8087b55ff..5c122ae6bfa 100644 --- a/include/asm-generic/syscall.h +++ b/include/asm-generic/syscall.h @@ -1,7 +1,7 @@ /* * Access to user system call parameters and results * - * Copyright (C) 2008 Red Hat, Inc. All rights reserved. + * Copyright (C) 2008-2009 Red Hat, Inc. All rights reserved. * * This copyrighted material is made available to anyone wishing to use, * modify, copy, or redistribute it subject to the terms and conditions @@ -32,9 +32,13 @@ struct pt_regs; * If @task is not executing a system call, i.e. it's blocked * inside the kernel for a fault or signal, returns -1. * + * Note this returns int even on 64-bit machines. Only 32 bits of + * system call number can be meaningful. If the actual arch value + * is 64 bits, this truncates to 32 bits so 0xffffffff means -1. + * * It's only valid to call this when @task is known to be blocked. */ -long syscall_get_nr(struct task_struct *task, struct pt_regs *regs); +int syscall_get_nr(struct task_struct *task, struct pt_regs *regs); /** * syscall_rollback - roll back registers after an aborted system call -- cgit From b28cfd2c0616e1b42acc6ee3c77ef6cc3873c510 Mon Sep 17 00:00:00 2001 From: Andi Kleen Date: Tue, 22 Sep 2009 16:44:05 -0700 Subject: kmap_types.h: rename D macro I tend to use a 'D' debugging macro a lot during debugging. When I define it before includes I often get conflicts with kmap_types.h's use of 'D' too. It's not very nice when a global include pollutes the name space like this. Rename the kmap_types.h D to KMAP_D. It is only used temporarily in the header so has no effect on anything else. Signed-off-by: Andi Kleen Reviewed-by: WANG Cong Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/kmap_types.h | 47 ++++++++++++++++++++-------------------- 1 file changed, 24 insertions(+), 23 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/kmap_types.h b/include/asm-generic/kmap_types.h index eddbce0f9fb..e5f234a0854 100644 --- a/include/asm-generic/kmap_types.h +++ b/include/asm-generic/kmap_types.h @@ -2,34 +2,35 @@ #define _ASM_GENERIC_KMAP_TYPES_H #ifdef __WITH_KM_FENCE -# define D(n) __KM_FENCE_##n , +# define KMAP_D(n) __KM_FENCE_##n , #else -# define D(n) +# define KMAP_D(n) #endif enum km_type { -D(0) KM_BOUNCE_READ, -D(1) KM_SKB_SUNRPC_DATA, -D(2) KM_SKB_DATA_SOFTIRQ, -D(3) KM_USER0, -D(4) KM_USER1, -D(5) KM_BIO_SRC_IRQ, -D(6) KM_BIO_DST_IRQ, -D(7) KM_PTE0, -D(8) KM_PTE1, -D(9) KM_IRQ0, -D(10) KM_IRQ1, -D(11) KM_SOFTIRQ0, -D(12) KM_SOFTIRQ1, -D(13) KM_SYNC_ICACHE, -D(14) KM_SYNC_DCACHE, -D(15) KM_UML_USERCOPY, /* UML specific, for copy_*_user - used in do_op_one_page */ -D(16) KM_IRQ_PTE, -D(17) KM_NMI, -D(18) KM_NMI_PTE, -D(19) KM_TYPE_NR +KMAP_D(0) KM_BOUNCE_READ, +KMAP_D(1) KM_SKB_SUNRPC_DATA, +KMAP_D(2) KM_SKB_DATA_SOFTIRQ, +KMAP_D(3) KM_USER0, +KMAP_D(4) KM_USER1, +KMAP_D(5) KM_BIO_SRC_IRQ, +KMAP_D(6) KM_BIO_DST_IRQ, +KMAP_D(7) KM_PTE0, +KMAP_D(8) KM_PTE1, +KMAP_D(9) KM_IRQ0, +KMAP_D(10) KM_IRQ1, +KMAP_D(11) KM_SOFTIRQ0, +KMAP_D(12) KM_SOFTIRQ1, +KMAP_D(13) KM_SYNC_ICACHE, +KMAP_D(14) KM_SYNC_DCACHE, +/* UML specific, for copy_*_user - used in do_op_one_page */ +KMAP_D(15) KM_UML_USERCOPY, +KMAP_D(16) KM_IRQ_PTE, +KMAP_D(17) KM_NMI, +KMAP_D(18) KM_NMI_PTE, +KMAP_D(19) KM_TYPE_NR }; -#undef D +#undef KMAP_D #endif -- cgit From 00afe029aab03bd95eba210b5e74a252017c4692 Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Tue, 22 Sep 2009 16:44:14 -0700 Subject: asm/sections: add text/data checking functions for arches to override Some ports (like the Blackfin arch) have a discontiguous memory map which means there may be text or data that falls outside of the standard range of the start/end text/data symbols. Creating some helper functions allows these non-standard ports to declare these regions without adversely affecting anyone else. Signed-off-by: Mike Frysinger Cc: Ingo Molnar Cc: Robin Getz Cc: Sam Ravnborg Cc: Peter Zijlstra Cc: Arnd Bergmann Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/sections.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/sections.h b/include/asm-generic/sections.h index d083561337f..b3bfabc258f 100644 --- a/include/asm-generic/sections.h +++ b/include/asm-generic/sections.h @@ -23,4 +23,20 @@ extern char __ctors_start[], __ctors_end[]; #define dereference_function_descriptor(p) (p) #endif +/* random extra sections (if any). Override + * in asm/sections.h */ +#ifndef arch_is_kernel_text +static inline int arch_is_kernel_text(unsigned long addr) +{ + return 0; +} +#endif + +#ifndef arch_is_kernel_data +static inline int arch_is_kernel_data(unsigned long addr) +{ + return 0; +} +#endif + #endif /* _ASM_GENERIC_SECTIONS_H_ */ -- cgit From a4177ee7f1a83eecb1d75e85d32664b023ef65e9 Mon Sep 17 00:00:00 2001 From: Jani Nikula Date: Tue, 22 Sep 2009 16:46:33 -0700 Subject: gpiolib: allow exported GPIO nodes to be named using sysfs links Commit 926b663ce8215ba448960e1ff6e58b67a2c3b99b (gpiolib: allow GPIOs to be named) already provides naming on the chip level. This patch provides more flexibility by allowing multiple names where ever in sysfs on a per GPIO basis. Adapted from David Brownell's comments on a similar concept: http://lkml.org/lkml/2009/4/20/203. [randy.dunlap@oracle.com: fix build for CONFIG_GENERIC_GPIO=n] Signed-off-by: Jani Nikula Acked-by: David Brownell Cc: Daniel Silverstone Signed-off-by: Randy Dunlap Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/gpio.h | 8 ++++++++ 1 file changed, 8 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index d6c379dc64f..9cca3785cab 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -141,6 +141,8 @@ extern int __gpio_to_irq(unsigned gpio); * but more typically is configured entirely from userspace. */ extern int gpio_export(unsigned gpio, bool direction_may_change); +extern int gpio_export_link(struct device *dev, const char *name, + unsigned gpio); extern void gpio_unexport(unsigned gpio); #endif /* CONFIG_GPIO_SYSFS */ @@ -185,6 +187,12 @@ static inline int gpio_export(unsigned gpio, bool direction_may_change) return -ENOSYS; } +static inline int gpio_export_link(struct device *dev, const char *name, + unsigned gpio) +{ + return -ENOSYS; +} + static inline void gpio_unexport(unsigned gpio) { } -- cgit From 29c337a034b5526e80a785409d15d3b7c7edecf4 Mon Sep 17 00:00:00 2001 From: Rusty Russell Date: Thu, 24 Sep 2009 09:34:26 -0600 Subject: cpumask: remove obsolete node_to_cpumask now everyone uses cpumask_of_node Signed-off-by: Rusty Russell --- include/asm-generic/topology.h | 17 ----------------- 1 file changed, 17 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/topology.h b/include/asm-generic/topology.h index 88bada2ebc4..510df36dd5d 100644 --- a/include/asm-generic/topology.h +++ b/include/asm-generic/topology.h @@ -37,9 +37,6 @@ #ifndef parent_node #define parent_node(node) ((void)(node),0) #endif -#ifndef node_to_cpumask -#define node_to_cpumask(node) ((void)node, cpu_online_map) -#endif #ifndef cpumask_of_node #define cpumask_of_node(node) ((void)node, cpu_online_mask) #endif @@ -55,18 +52,4 @@ #endif /* CONFIG_NUMA */ -/* - * returns pointer to cpumask for specified node - * Deprecated: use "const struct cpumask *mask = cpumask_of_node(node)" - */ -#ifndef node_to_cpumask_ptr - -#define node_to_cpumask_ptr(v, node) \ - cpumask_t _##v = node_to_cpumask(node); \ - const cpumask_t *v = &_##v - -#define node_to_cpumask_ptr_next(v, node) \ - _##v = node_to_cpumask(node) -#endif - #endif /* _ASM_GENERIC_TOPOLOGY_H */ -- cgit From ba0a6c9f6fceed11c6a99e8326f0477fe383e6b5 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Wed, 23 Sep 2009 15:57:03 -0700 Subject: fcntl: add F_[SG]ETOWN_EX In order to direct the SIGIO signal to a particular thread of a multi-threaded application we cannot, like suggested by the manpage, put a TID into the regular fcntl(F_SETOWN) call. It will still be send to the whole process of which that thread is part. Since people do want to properly direct SIGIO we introduce F_SETOWN_EX. The need to direct SIGIO comes from self-monitoring profiling such as with perf-counters. Perf-counters uses SIGIO to notify that new sample data is available. If the signal is delivered to the same task that generated the new sample it can augment that data by inspecting the task's user-space state right after it returns from the kernel. This is esp. convenient for interpreted or virtual machine driven environments. Both F_SETOWN_EX and F_GETOWN_EX take a pointer to a struct f_owner_ex as argument: struct f_owner_ex { int type; pid_t pid; }; Where type is one of F_OWNER_TID, F_OWNER_PID or F_OWNER_GID. Signed-off-by: Peter Zijlstra Reviewed-by: Oleg Nesterov Tested-by: stephane eranian Cc: Michael Kerrisk Cc: Roland McGrath Cc: Al Viro Cc: Christoph Hellwig Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/fcntl.h | 13 +++++++++++++ 1 file changed, 13 insertions(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/fcntl.h b/include/asm-generic/fcntl.h index 4d3e48373e7..0c3dd860392 100644 --- a/include/asm-generic/fcntl.h +++ b/include/asm-generic/fcntl.h @@ -73,6 +73,19 @@ #define F_SETSIG 10 /* for sockets. */ #define F_GETSIG 11 /* for sockets. */ #endif +#ifndef F_SETOWN_EX +#define F_SETOWN_EX 12 +#define F_GETOWN_EX 13 +#endif + +#define F_OWNER_TID 0 +#define F_OWNER_PID 1 +#define F_OWNER_GID 2 + +struct f_owner_ex { + int type; + pid_t pid; +}; /* for F_[GET|SET]FL */ #define FD_CLOEXEC 1 /* actually anything with low bit set goes */ -- cgit From 1b2086227cd1a24f748398c22ea9652c383499cf Mon Sep 17 00:00:00 2001 From: Tim Abbott Date: Thu, 24 Sep 2009 10:36:16 -0400 Subject: Optimize the ordering of sections in RW_DATA_SECTION. The old RW_DATA_SECTION had INIT_TASK_DATA (which was more-than-PAGE_SIZE-aligned), followed by a bunch of small alignment stuff, followed by more PAGE_SIZE-aligned stuff, so you wasted memory in the middle of .data re-aligning back up to PAGE_SIZE. This patch sorts the sections by alignment requirements, which should pack them essentially optimally. Signed-off-by: Tim Abbott Reviewed-by: Sam Ravnborg Signed-off-by: Linus Torvalds --- include/asm-generic/vmlinux.lds.h | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) (limited to 'include/asm-generic') diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index 29ca8f53ffb..b6e818f4b24 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -721,12 +721,12 @@ . = ALIGN(PAGE_SIZE); \ .data : AT(ADDR(.data) - LOAD_OFFSET) { \ INIT_TASK_DATA(inittask) \ + NOSAVE_DATA \ + PAGE_ALIGNED_DATA(pagealigned) \ CACHELINE_ALIGNED_DATA(cacheline) \ READ_MOSTLY_DATA(cacheline) \ DATA_DATA \ CONSTRUCTORS \ - NOSAVE_DATA \ - PAGE_ALIGNED_DATA(pagealigned) \ } #define INIT_TEXT_SECTION(inittext_align) \ -- cgit From b3db4a8ad19173a8fd0ced13d47c97910f1ab14b Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Thu, 1 Oct 2009 15:43:56 -0700 Subject: asm-generic/gpio.h: pull in linux/kernel.h for might_sleep() The asm-generic/gpio.h header uses the might_sleep() macro but doesn't include the header for it, so any source code that might include linux/gpio.h before linux/kernel.h can easily lead to a build failure. Signed-off-by: Mike Frysinger Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- include/asm-generic/gpio.h | 1 + 1 file changed, 1 insertion(+) (limited to 'include/asm-generic') diff --git a/include/asm-generic/gpio.h b/include/asm-generic/gpio.h index 9cca3785cab..66d6106a206 100644 --- a/include/asm-generic/gpio.h +++ b/include/asm-generic/gpio.h @@ -1,6 +1,7 @@ #ifndef _ASM_GENERIC_GPIO_H #define _ASM_GENERIC_GPIO_H +#include #include #include -- cgit