diff options
| author | Breno Leitao <leitao@debian.org> | 2026-08-05 07:52:36 -0700 |
|---|---|---|
| committer | Tejun Heo <tj@kernel.org> | 2026-08-10 11:47:20 -1000 |
| commit | a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656 (patch) | |
| tree | 39f5b258386e1127d253d293194e9a2991bf3c34 /arch/powerpc/sysdev/dcr-low.S | |
| download | linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.tar.gz linux-stable-a5bde5d8fde8a8cb28e59a672d5ddc5b9c1e7656.zip | |
workqueue: skip the node_nr_active update for non-unbound workqueuesgrafted
apply_wqattrs_commit() updates node_nr_active->max unconditionally.
wq->node_nr_active[] is only allocated for unbound workqueues, so guard
the call before per-cpu workqueues start using this path.
No functional change: only unbound workqueues reach apply_wqattrs_*()
today.
Signed-off-by: Breno Leitao <leitao@debian.org>
Signed-off-by: Tejun Heo <tj@kernel.org>
Diffstat (limited to 'arch/powerpc/sysdev/dcr-low.S')
| -rw-r--r-- | arch/powerpc/sysdev/dcr-low.S | 44 |
1 files changed, 44 insertions, 0 deletions
diff --git a/arch/powerpc/sysdev/dcr-low.S b/arch/powerpc/sysdev/dcr-low.S new file mode 100644 index 000000000..e8401b205 --- /dev/null +++ b/arch/powerpc/sysdev/dcr-low.S @@ -0,0 +1,44 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * "Indirect" DCR access + * + * Copyright (c) 2004 Eugene Surovegin <ebs@ebshome.net> + */ + +#include <linux/export.h> +#include <asm/ppc_asm.h> +#include <asm/processor.h> +#include <asm/bug.h> + +#define DCR_ACCESS_PROLOG(table) \ + cmplwi cr0,r3,1024; \ + rlwinm r3,r3,4,18,27; \ + lis r5,table@h; \ + ori r5,r5,table@l; \ + add r3,r3,r5; \ + bge- 1f; \ + mtctr r3; \ + bctr; \ +1: trap; \ + EMIT_BUG_ENTRY 1b,__FILE__,__LINE__,0; \ + blr + +_GLOBAL(__mfdcr) + DCR_ACCESS_PROLOG(__mfdcr_table) +EXPORT_SYMBOL(__mfdcr) + +_GLOBAL(__mtdcr) + DCR_ACCESS_PROLOG(__mtdcr_table) +EXPORT_SYMBOL(__mtdcr) + +__mfdcr_table: + mfdcr r3,0; blr +__mtdcr_table: + mtdcr 0,r4; blr + +dcr = 1 + .rept 1023 + mfdcr r3,dcr; blr + mtdcr dcr,r4; blr + dcr = dcr + 1 + .endr |