Peter Zijlstra 19d436268d debug: Add _ONCE() logic to report_bug() ...

Josh suggested moving the _ONCE logic inside the trap handler, using a
bit in the bug_entry::flags field, avoiding the need for the extra
variable.

Sadly this only works for WARN_ON_ONCE(), since the others have
printk() statements prior to triggering the trap.

Still, this saves a fair amount of text and some data:

  text         data       filename
  10682460     4530992    defconfig-build/vmlinux.orig
  10665111     4530096    defconfig-build/vmlinux.patched

Suggested-by: Josh Poimboeuf <jpoimboe@redhat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Arnd Bergmann <arnd@arndb.de>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@kernel.org>

2017-03-30 09:37:20 +02:00

..

bitops

bitops: Do not default to __clear_bit() for __clear_bit_unlock()

2016-03-21 10:50:48 +01:00

4level-fixup.h

asm-generic: introduce 5level-fixup.h

2017-03-09 11:48:47 -08:00

5level-fixup.h

asm-generic: introduce 5level-fixup.h

2017-03-09 11:48:47 -08:00

asm-offsets.h

asm-generic: Add common asm-offsets.h

2015-06-23 13:35:49 +09:00

asm-prototypes.h

asm-prototypes: Clear any CPP defines before declaring the functions

2017-01-05 12:57:42 +01:00

atomic64.h

locking/atomic: Implement atomic{,64,_long}_fetch_{add,sub,and,andnot,or,xor}{,_relaxed,_acquire,_release}()

2016-06-16 10:48:32 +02:00

atomic-long.h

locking/atomic: Introduce inc/dec variants for the atomic_fetch_$op() API

2016-07-07 09:16:20 +02:00

atomic.h

openrisc: add optimized atomic operations

2017-02-25 04:14:06 +09:00

audit_change_attr.h

audit: Modify a set of system calls in audit class definitions

2014-01-17 17:01:46 -05:00

audit_dir_write.h

…

audit_read.h

…

audit_signal.h

…

audit_write.h

audit: Modify a set of system calls in audit class definitions

2014-01-17 17:01:46 -05:00

barrier.h

locking/spinlock, arch: Update and fix spin_unlock_wait() implementations

2016-06-14 11:55:15 +02:00

bitops.h

arch: Prepare for smp_mb__{before,after}_atomic()

2014-04-18 11:40:30 +02:00

bitsperlong.h

…

bug.h

debug: Add _ONCE() logic to report_bug()

2017-03-30 09:37:20 +02:00

bugs.h

…

cache.h

…

cacheflush.h

…

checksum.h

ipv4: Update parameters for csum_tcpudp_magic to their original types

2016-03-13 23:55:13 -04:00

clkdev.h

asm-generic: COMMON_CLK defines __clk_{get,put}

2014-09-25 18:00:45 -07:00

cmpxchg-local.h

LLVMLinux: Remove warning about returning an uninitialized variable

2014-04-09 13:44:35 -07:00

cmpxchg.h

asm-generic: cmpxchg: avoid warnings from macro-ized cmpxchg() implementations

2015-10-15 00:21:13 +02:00

current.h

…

delay.h

…

device.h

…

div64.h

__div64_32(): make it overridable at compile time

2015-11-16 14:42:12 -05:00

dma-contiguous.h

asm-generic: Add dma-contiguous.h

2014-09-22 13:35:51 +02:00

dma.h

…

early_ioremap.h

Merge branch 'akpm' (patches from Andrew)

2015-09-08 17:52:23 -07:00

emergency-restart.h

…

exec.h

…

export.h

modversions: treat symbol CRCs as 32 bit quantities

2017-02-03 08:28:25 -08:00

fb.h

…

fixmap.h

asm-generic: Fix local variable shadow in __set_fixmap_offset

2016-02-16 15:10:44 +00:00

ftrace.h

…

futex.h

asm-generic/futex: Re-enable preemption in futex_atomic_cmpxchg_inatomic()

2016-04-21 11:06:09 +02:00

getorder.h

…

gpio.h

gpio: allow setting ARCH_NR_GPIOS from Kconfig

2016-02-19 00:22:54 +01:00

hardirq.h

…

hugetlb.h

mm: Fix generic hugetlb pte check return type.

2013-10-02 20:02:35 -04:00

hw_irq.h

…

ide_iops.h

…

int-ll64.h

…

io.h

asm-generic/io.h: add io{read,write}64 accessors

2016-05-31 16:41:50 +08:00

ioctl.h

include/asm-generic/ioctl.h: fix _IOC_TYPECHECK sparse error

2014-06-06 16:08:13 -07:00

iomap.h

asm-generic/io.h: add io{read,write}64 accessors

2016-05-31 16:41:50 +08:00

irq_regs.h

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irq_work.h

irq_work: Introduce arch_irq_work_has_interrupt()

2014-09-13 18:38:07 +02:00

irq.h

…

irqflags.h

…

Kbuild.asm

…

kdebug.h

…

kmap_types.h

…

kprobes.h

kprobes: move kprobe declarations to asm-generic/kprobes.h

2017-02-27 18:43:45 -08:00

kvm_para.h

KVM: add kvm_para_available to asm-generic/kvm_para.h

2013-06-05 13:21:29 +03:00

linkage.h

…

local64.h

…

local.h

…

mcs_spinlock.h

locking/mcs: Allow architecture specific asm files to be used for contended case

2014-02-09 21:18:52 +01:00

memory_model.h

mm: add PHYS_PFN, use it in __phys_to_pfn()

2016-01-14 16:00:49 -08:00

mm_hooks.h

mm/core, x86/mm/pkeys: Differentiate instruction fetches

2016-02-18 19:46:29 +01:00

mm-arch-hooks.h

mm: clean up per architecture MM hook header files

2015-07-17 16:39:53 -07:00

mmu_context.h

asm-generic: Remove asm-generic arch_bprm_mm_init()

2014-11-22 21:52:08 +01:00

mmu.h

…

module.h

…

msi.h

asm-generic: Add msi.h

2014-11-23 13:01:47 +01:00

page.h

asm-generic: page.h: Remove useless get_user_page and free_user_page

2016-02-26 15:24:55 +01:00

param.h

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parport.h

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pci_iomap.h

PCI: Add pci_iomap_wc() variants

2015-08-25 09:59:45 +02:00

pci.h

PCI: Remove unused pcibios_select_root() (again)

2015-06-08 07:56:21 -05:00

percpu.h

percpu: use notrace variant of preempt_disable/preempt_enable

2016-11-08 10:29:44 +01:00

pgalloc.h

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pgtable-nop4d-hack.h

asm-generic: introduce __ARCH_USE_5LEVEL_HACK

2017-03-09 11:48:47 -08:00

pgtable-nop4d.h

asm-generic: introduce <asm-generic/pgtable-nop4d.h>

2017-03-09 11:48:47 -08:00

pgtable-nopmd.h

…

pgtable-nopud.h

asm-generic: introduce <asm-generic/pgtable-nop4d.h>

2017-03-09 11:48:47 -08:00

pgtable.h

mm: convert generic code to 5-level paging

2017-03-09 11:48:47 -08:00

preempt.h

sched/preempt: Fix preempt_count manipulations

2016-05-17 12:24:21 +02:00

ptrace.h

…

qrwlock_types.h

locking/qrwlock: Rename ->lock to ->wait_lock

2015-09-18 09:27:29 +02:00

qrwlock.h

locking/qrwlock: Fix write unlock bug on big endian systems

2016-08-10 14:13:27 +02:00

qspinlock_types.h

locking/qspinlock: Move __ARCH_SPIN_LOCK_UNLOCKED to qspinlock_types.h

2016-02-29 10:02:43 +01:00

qspinlock.h

locking/qspinlock: Use atomic_sub_return_release() in queued_spin_unlock()

2016-06-08 15:17:01 +02:00

resource.h

asm-generic: remove _STK_LIM_MAX

2014-05-15 00:32:09 +01:00

rwsem.h

locking/rwsem: Remove unnecessary atomic_long_t casts

2017-01-20 09:46:44 +01:00

seccomp.h

seccomp: Get compat syscalls from asm-generic header

2016-05-13 14:02:00 +02:00

sections.h

mm: kmemleak: scan .data.ro_after_init

2016-11-11 08:12:37 -08:00

segment.h

…

serial.h

…

siginfo.h

SIGNAL: Move generic copy_siginfo() to signal.h

2016-05-13 14:02:10 +02:00

signal.h

…

simd.h

crypto: create generic version of ablk_helper

2013-09-24 06:02:24 +10:00

sizes.h

…

spinlock.h

…

statfs.h

…

string.h

…

switch_to.h

…

syscall.h

syscall.h: fix doc text for syscall_get_arch()

2014-09-23 16:20:00 -04:00

syscalls.h

burying unused conditionals

2013-02-14 09:21:15 -05:00

termios-base.h

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

termios.h

Replace <asm/uaccess.h> with <linux/uaccess.h> globally

2016-12-24 11:46:01 -08:00

timex.h

…

tlb.h

asm-generic: introduce <asm-generic/pgtable-nop4d.h>

2017-03-09 11:48:47 -08:00

tlbflush.h

…

topology.h

…

trace_clock.h

…

uaccess-unaligned.h

…

uaccess.h

exceptions: detritus removal

2016-09-27 21:15:14 -04:00

unaligned.h

asm-generic: allow generic unaligned access if the arch supports it

2014-05-08 10:22:23 +02:00

unistd.h

Merge tag 'modules-next-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/rusty/linux

2013-05-05 10:58:06 -07:00

user.h

…

vga.h

…

vmlinux.lds.h

debug: Add _ONCE() logic to report_bug()

2017-03-30 09:37:20 +02:00

vtime.h

include/asm-generic/vtime.h: avoid zero-length file

2013-09-30 14:31:02 -07:00

word-at-a-time.h

Make asm/word-at-a-time.h available on all architectures

2015-07-08 16:41:55 -04:00

xor.h

…