The patch titled
Subject: perf/hw_breakpoint: use ERR_PTR_PCPU(), IS_ERR_PCPU() and PTR_ERR_PCPU() macros
has been added to the -mm mm-nonmm-unstable branch. Its filename is
perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros.patch
This patch will shortly appear at
https://git.kernel.org/pub/scm/linux/kernel/git/akpm/25-new.git/tree/patches/perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros.patch
This patch will later appear in the mm-nonmm-unstable branch at
git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm
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------------------------------------------------------
From: Uros Bizjak <ubizjak@xxxxxxxxx>
Subject: perf/hw_breakpoint: use ERR_PTR_PCPU(), IS_ERR_PCPU() and PTR_ERR_PCPU() macros
Date: Tue, 24 Sep 2024 11:07:13 +0200
Use ERR_PTR_PCPU() when returning error pointer in the percpu address
space. Use IS_ERR_PCPU() and PTR_ERR_PCPU() when returning the error
pointer from the percpu address space. These macros add intermediate cast
to unsigned long when switching named address spaces.
The patch will avoid future build errors due to pointer address space
mismatch with enabled strict percpu address space checks.
Link: https://lkml.kernel.org/r/20240924090813.1353586-1-ubizjak@xxxxxxxxx
Signed-off-by: Uros Bizjak <ubizjak@xxxxxxxxx>
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Alexander Shishkin <alexander.shishkin@xxxxxxxxxxxxxxx>
Cc: Jiri Olsa <jolsa@xxxxxxxxxx>
Cc: Ian Rogers <irogers@xxxxxxxxxx>
Cc: Adrian Hunter <adrian.hunter@xxxxxxxxx>
Cc: "Liang, Kan" <kan.liang@xxxxxxxxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
kernel/events/hw_breakpoint.c | 4 ++--
samples/hw_breakpoint/data_breakpoint.c | 4 ++--
2 files changed, 4 insertions(+), 4 deletions(-)
--- a/kernel/events/hw_breakpoint.c~perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros
+++ a/kernel/events/hw_breakpoint.c
@@ -849,7 +849,7 @@ register_wide_hw_breakpoint(struct perf_
cpu_events = alloc_percpu(typeof(*cpu_events));
if (!cpu_events)
- return (void __percpu __force *)ERR_PTR(-ENOMEM);
+ return ERR_PTR_PCPU(-ENOMEM);
cpus_read_lock();
for_each_online_cpu(cpu) {
@@ -868,7 +868,7 @@ register_wide_hw_breakpoint(struct perf_
return cpu_events;
unregister_wide_hw_breakpoint(cpu_events);
- return (void __percpu __force *)ERR_PTR(err);
+ return ERR_PTR_PCPU(err);
}
EXPORT_SYMBOL_GPL(register_wide_hw_breakpoint);
--- a/samples/hw_breakpoint/data_breakpoint.c~perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros
+++ a/samples/hw_breakpoint/data_breakpoint.c
@@ -52,8 +52,8 @@ static int __init hw_break_module_init(v
attr.bp_type = HW_BREAKPOINT_W;
sample_hbp = register_wide_hw_breakpoint(&attr, sample_hbp_handler, NULL);
- if (IS_ERR((void __force *)sample_hbp)) {
- ret = PTR_ERR((void __force *)sample_hbp);
+ if (IS_ERR_PCPU(sample_hbp)) {
+ ret = PTR_ERR_PCPU(sample_hbp);
goto fail;
}
_
Patches currently in -mm which might be from ubizjak@xxxxxxxxx are
perf-hw_breakpoint-use-err_ptr_pcpu-is_err_pcpu-and-ptr_err_pcpu-macros.patch
