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4b3b4c5e64
linux/include/asm-generic
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John Reiser 4b3b4c5e64 ftrace: __start_mcount_loc should be .init.rodata 
__start_mcount_loc[] is unused after init, yet occupies RAM forever
as part of .rodata.  152kiB is typical on a 64-bit architecture.  Instead,
__start_mcount_loc should be in the interval [__init_begin, __init_end)
so that the space is reclaimed after init.

__start_mcount_loc[] is generated during the load portion
of kernel build, and is used only by ftrace_init().  ftrace_init is declared
'__init' and is in .init.text, which is freed after init.
__start_mcount_loc is placed into .rodata by a call to MCOUNT_REC inside
the RO_DATA macro of include/asm-generic/vmlinux.lds.h.  The array *is*
read-only, but more importantly it is not used after init.  So the call to
MCOUNT_REC should be moved from RO_DATA to INIT_DATA.

This patch has been tested on x86_64 with CONFIG_DEBUG_PAGEALLOC=y
which verifies that the address range never is accessed after init.

Signed-off-by: John Reiser <jreiser@BitWagon.com>
LKML-Reference: <4A6DF0B6.7080402@bitwagon.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
2009-09-12 21:57:29 -04:00
..
bitops asm-generic: rename atomic.h to atomic-long.h 2009-06-11 21:02:17 +02:00
4level-fixup.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
atomic64.h lib: Provide generic atomic64_t implementation 2009-06-15 13:27:38 +10:00
atomic-long.h asm-generic: merge branch 'master' of torvalds/linux-2.6 2009-06-12 11:32:58 +02:00
atomic.h asm-generic: add generic atomic.h and io.h 2009-06-11 21:02:49 +02:00
audit_change_attr.h
audit_dir_write.h
audit_read.h
audit_signal.h
audit_write.h [PATCH] asm/generic: fix bug - kernel fails to build when enable some common audit code on Blackfin 2008-12-09 02:27:39 -05:00
auxvec.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
bitops.h asm-generic: make bitops.h usable 2009-06-11 21:02:31 +02:00
bitsperlong.h asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
bug.h Eliminate thousands of warnings with gcc 3.2 build 2009-05-06 16:36:09 -07:00
bugs.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
cache.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
cacheflush.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
checksum.h add generic lib/checksum.c 2009-06-11 21:02:51 +02:00
cmpxchg-local.h
cmpxchg.h
cputime.h
current.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
delay.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
device.h
div64.h rename div64_64 to div64_u64 2008-05-01 08:03:58 -07:00
dma-coherent.h generic: per-device coherent dma allocator 2008-06-30 12:51:05 +02:00
dma-mapping-broken.h dma-mapping: add the device argument to dma_mapping_error() 2008-07-26 12:00:03 -07:00
dma-mapping-common.h dma-mapping: add asm-generic/dma-mapping-common.h 2009-06-18 13:03:58 -07:00
dma.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
emergency-restart.h
errno-base.h
errno.h cfg80211: add rfkill support 2009-06-03 14:06:14 -04:00
fb.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
fcntl.h make exported headers use strict posix types 2009-03-26 18:14:14 +01:00
futex.h remove __KERNEL__ tests of unexported headers under asm-generic/ 2008-04-30 08:29:54 -07:00
getorder.h asm-generic: rename page.h and uaccess.h 2009-06-11 21:02:17 +02:00
gpio.h gpiolib: allow GPIOs to be named 2009-04-02 19:04:51 -07:00
hardirq.h asm-generic: drop HARDIRQ_BITS definition from hardirq.h 2009-06-19 14:58:09 +02:00
hw_irq.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
ide_iops.h
int-l64.h asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
int-ll64.h asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
io.h asm-generic: add generic atomic.h and io.h 2009-06-11 21:02:49 +02:00
ioctl.h Make ioctl.h compatible with userland 2008-08-12 16:07:31 -07:00
ioctls.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
iomap.h generic: add ioremap_wc() interface wrapper 2008-04-24 23:40:47 +02:00
ipcbuf.h asm-generic: add generic sysv ipc headers 2009-06-11 21:02:15 +02:00
irq_regs.h
irq.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
irqflags.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
Kbuild asm-generic: add a generic unistd.h 2009-06-11 21:02:16 +02:00
Kbuild.asm asm-generic: introduce asm/bitsperlong.h 2009-06-11 21:02:14 +02:00
kdebug.h asm-generic: define DIE_OOPS in asm-generic 2008-10-27 11:39:03 +01:00
kmap_types.h Merge branch 'linus' into perfcounters/core 2009-06-17 13:06:17 +02:00
libata-portmap.h
linkage.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
local.h asm-generic: fix local_add_unless macro 2009-05-18 08:34:08 -07:00
memory_model.h mm: remove CONFIG_OUT_OF_LINE_PFN_TO_PAGE 2009-01-06 15:59:10 -08:00
mm_hooks.h
mman-common.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
mman.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
mmu_context.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
mmu.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
module.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
msgbuf.h asm-generic: add generic sysv ipc headers 2009-06-11 21:02:15 +02:00
mutex-dec.h mutex: speed up generic mutex implementations 2008-10-23 09:18:20 -07:00
mutex-null.h
mutex-xchg.h mutex: speed up generic mutex implementations 2008-10-23 09:18:20 -07:00
mutex.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
page.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
param.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
parport.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
pci-dma-compat.h dma-mapping: add the device argument to dma_mapping_error() 2008-07-26 12:00:03 -07:00
pci.h Delete pcibios_select_root 2009-06-17 14:04:42 -07:00
percpu.h alpha: fix percpu build breakage 2009-06-30 18:55:59 -07:00
pgalloc.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
pgtable-nopmd.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
pgtable-nopud.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
pgtable.h asm-generic: add dummy pgprot_noncached() 2009-06-23 14:34:30 +02:00
poll.h
posix_types.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
resource.h
rtc.h asm-generic: make get_rtc_time overridable 2009-06-11 21:02:18 +02:00
scatterlist.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
sections.h kernel: constructor support 2009-06-18 13:03:57 -07:00
segment.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
sembuf.h asm-generic: add generic sysv ipc headers 2009-06-11 21:02:15 +02:00
serial.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
setup.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
shmbuf.h asm-generic: add generic sysv ipc headers 2009-06-11 21:02:15 +02:00
shmparam.h asm-generic: add generic sysv ipc headers 2009-06-11 21:02:15 +02:00
siginfo.h asm-generic/siginfo.h: update NSIGTRAP definition 2009-04-13 15:04:30 -07:00
signal-defs.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
signal.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
socket.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
sockios.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
spinlock.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
stat.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
statfs.h remove __KERNEL_STRICT_NAMES 2009-03-26 18:14:21 +01:00
string.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
swab.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
syscall.h tracehook: comment pasto fixes 2008-09-05 14:39:38 -07:00
syscalls.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
system.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
termbits.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
termios-base.h asm-generic: rename termios.h, signal.h and mman.h 2009-06-11 21:01:52 +02:00
termios.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
timex.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
tlb.h mm: Pass virtual address to [__]p{te,ud,md}_free_tlb() 2009-07-27 12:10:38 -07:00
tlbflush.h asm-generic: add generic NOMMU versions of some headers 2009-06-11 21:02:50 +02:00
topology.h cpumask: remove the now-obsoleted pcibus_to_cpumask(): generic 2009-03-30 22:05:17 +10:30
types.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
uaccess-unaligned.h asm-generic: rename page.h and uaccess.h 2009-06-11 21:02:17 +02:00
uaccess.h asm-generic: uaccess: fix up local access_ok() usage 2009-06-19 14:58:08 +02:00
ucontext.h asm-generic: add generic ABI headers 2009-06-11 21:02:15 +02:00
unaligned.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
unistd.h asm-generic: hook up new system calls 2009-06-19 14:58:11 +02:00
user.h asm-generic: add generic versions of common headers 2009-06-11 21:02:37 +02:00
vga.h asm-generic: add legacy I/O header files 2009-06-11 21:02:42 +02:00
vmlinux.lds.h ftrace: __start_mcount_loc should be .init.rodata 2009-09-12 21:57:29 -04:00
xor.h