diff options
| author | Zwane Mwaikambo <zwane@linuxpower.ca> | 2004-09-04 02:18:26 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2004-09-04 02:18:26 -0700 |
| commit | 50658d3358fa5127fa50c4301dbbb688b9b5e21a (patch) | |
| tree | ea9a71e519c6d51586bc6aa886d773ad5a857712 /include/asm-generic | |
| parent | 02f4290357f5329296a0a8101cf061e8715beae5 (diff) | |
[PATCH] out-of-line locks / generic
This patch achieves out of line spinlocks by creating kernel/spinlock.c
and using the _raw_* inline locking functions.
Now, as much as this is supposed to be arch agnostic, there was still a
fair amount of rummaging about in archs, mostly for the cases where the
arch already has out of line locks and i wanted to avoid the extra call,
saving that extra call also makes lock profiling easier. PPC32/64 was
an example of such an arch and i have added the necessary profile_pc()
function as an example.
Size differences are with CONFIG_PREEMPT enabled since we wanted to
determine how much could be saved by moving that lot out of line too.
ppc64 = 259897 bytes:
text data bss dec hex filename
5489808 1962724 709064 8161596 7c893c vmlinux-after
5749577 1962852 709064 8421493 808075 vmlinux-before
sparc64 = 193368 bytes:
text data bss dec hex filename
3472037 633712 308920 4414669 435ccd vmlinux-after
3665285 633832 308920 4608037 465025 vmlinux-before
i386 = 416075 bytes
text data bss dec hex filename
5808371 867442 326864 7002677 6ada35 vmlinux-after
6221254 870634 326864 7418752 713380 vmlinux-before
x86-64 = 282446 bytes
text data bss dec hex filename
4598025 1450644 523632 6572301 64490d vmlinux-after
4881679 1449436 523632 6854747 68985b vmlinux-before
It has been compile tested (UP, SMP, PREEMPT) on i386, x86-64, sparc,
sparc64, ppc64, ppc32 and runtime tested on i386, x86-64 and sparc64.
Signed-off-by: Zwane Mwaikambo <zwane@fsmlabs.com>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-generic')
| -rw-r--r-- | include/asm-generic/vmlinux.lds.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h index f223def885b2..49ff023fa2da 100644 --- a/include/asm-generic/vmlinux.lds.h +++ b/include/asm-generic/vmlinux.lds.h @@ -77,3 +77,8 @@ VMLINUX_SYMBOL(__sched_text_start) = .; \ *(.sched.text) \ VMLINUX_SYMBOL(__sched_text_end) = .; + +#define LOCK_TEXT \ + VMLINUX_SYMBOL(__lock_text_start) = .; \ + *(.lock.text) \ + VMLINUX_SYMBOL(__lock_text_end) = .; |