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| author |   Alexander van Heukelum <heukelum@mailshack.com> | 2008-05-13 11:28:21 +0200 |
|---|---|---|
| committer |   Thomas Gleixner <tglx@linutronix.de> | 2008-05-23 18:46:12 +0200 |
| commit | 7baac8b91f9871ba8cb09af84de4ae1d86d07812 (patch) | |
| tree | 4624f10539c3bb4581f99c1a187f1008502b8438 /kernel/sched_fair.c | |
| parent | net: Pass reference to cpumask variable in net/sunrpc/svc.c (diff) | |
| download | linux-dev-7baac8b91f9871ba8cb09af84de4ae1d86d07812.tar.xz linux-dev-7baac8b91f9871ba8cb09af84de4ae1d86d07812.zip | |
cpumask: make for_each_cpu_mask a bit smaller
The for_each_cpu_mask loop is used quite often in the kernel. It
makes use of two functions: first_cpu and next_cpu. This patch
changes for_each_cpu_mask to use only the latter. Because next_cpu
finds the next eligible cpu _after_ the given one, the iteration
variable has to be initialized to -1 and next_cpu has to be
called with this value before the first iteration. An x86_64
defconfig kernel (from sched/latest) is about 2500 bytes smaller
with this patch applied:
text data bss dec hex filename
6222517 917952 749932 7890401 7865e1 vmlinux.orig
6219922 917952 749932 7887806 785bbe vmlinux
The same size reduction is seen for defconfig+MAXSMP
text data bss dec hex filename
6241772 2563968 1492716 10298456 9d2458 vmlinux.orig
6239211 2563968 1492716 10295895 9d1a57 vmlinux
Signed-off-by: Alexander van Heukelum <heukelum@fastmail.fm>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Diffstat (limited to 'kernel/sched_fair.c')
0 files changed, 0 insertions, 0 deletions