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| 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/sparc/lib/M7patch.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/sparc/lib/M7patch.S')
| -rw-r--r-- | arch/sparc/lib/M7patch.S | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/arch/sparc/lib/M7patch.S b/arch/sparc/lib/M7patch.S new file mode 100644 index 000000000..9000b7bc5 --- /dev/null +++ b/arch/sparc/lib/M7patch.S @@ -0,0 +1,51 @@ +/* + * M7patch.S: Patch generic routines with M7 variant. + * + * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. + */ + +#include <linux/linkage.h> + +#define BRANCH_ALWAYS 0x10680000 +#define NOP 0x01000000 +#define NG_DO_PATCH(OLD, NEW) \ + sethi %hi(NEW), %g1; \ + or %g1, %lo(NEW), %g1; \ + sethi %hi(OLD), %g2; \ + or %g2, %lo(OLD), %g2; \ + sub %g1, %g2, %g1; \ + sethi %hi(BRANCH_ALWAYS), %g3; \ + sll %g1, 11, %g1; \ + srl %g1, 11 + 2, %g1; \ + or %g3, %lo(BRANCH_ALWAYS), %g3; \ + or %g3, %g1, %g3; \ + stw %g3, [%g2]; \ + sethi %hi(NOP), %g3; \ + or %g3, %lo(NOP), %g3; \ + stw %g3, [%g2 + 0x4]; \ + flush %g2; + +ENTRY(m7_patch_copyops) + NG_DO_PATCH(memcpy, M7memcpy) + NG_DO_PATCH(raw_copy_from_user, M7copy_from_user) + NG_DO_PATCH(raw_copy_to_user, M7copy_to_user) + retl + nop +ENDPROC(m7_patch_copyops) + +ENTRY(m7_patch_bzero) + NG_DO_PATCH(memset, M7memset) + NG_DO_PATCH(__bzero, M7bzero) + NG_DO_PATCH(__clear_user, NGclear_user) + NG_DO_PATCH(tsb_init, NGtsb_init) + retl + nop +ENDPROC(m7_patch_bzero) + +ENTRY(m7_patch_pageops) + NG_DO_PATCH(copy_user_page, NG4copy_user_page) + NG_DO_PATCH(_clear_page, M7clear_page) + NG_DO_PATCH(clear_user_page, M7clear_user_page) + retl + nop +ENDPROC(m7_patch_pageops) |