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Message-ID: <1d4fe5963904cc0c707da1f53fbfe6471d3eff10.1755012943.git.lorenzo.stoakes@oracle.com>
Date: Tue, 12 Aug 2025 16:44:14 +0100
From: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
To: Andrew Morton <akpm@...ux-foundation.org>
Cc: Alexander Gordeev <agordeev@...ux.ibm.com>,
Gerald Schaefer <gerald.schaefer@...ux.ibm.com>,
Heiko Carstens <hca@...ux.ibm.com>, Vasily Gorbik <gor@...ux.ibm.com>,
Christian Borntraeger <borntraeger@...ux.ibm.com>,
Sven Schnelle <svens@...ux.ibm.com>,
"David S . Miller" <davem@...emloft.net>,
Andreas Larsson <andreas@...sler.com>,
Dave Hansen <dave.hansen@...ux.intel.com>,
Andy Lutomirski <luto@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Thomas Gleixner <tglx@...utronix.de>, Ingo Molnar <mingo@...hat.com>,
Borislav Petkov <bp@...en8.de>, "H . Peter Anvin" <hpa@...or.com>,
Alexander Viro <viro@...iv.linux.org.uk>,
Christian Brauner <brauner@...nel.org>, Jan Kara <jack@...e.cz>,
Kees Cook <kees@...nel.org>, David Hildenbrand <david@...hat.com>,
Zi Yan <ziy@...dia.com>, Baolin Wang <baolin.wang@...ux.alibaba.com>,
"Liam R . Howlett" <Liam.Howlett@...cle.com>,
Nico Pache <npache@...hat.com>, Ryan Roberts <ryan.roberts@....com>,
Dev Jain <dev.jain@....com>, Barry Song <baohua@...nel.org>,
Xu Xin <xu.xin16@....com.cn>,
Chengming Zhou <chengming.zhou@...ux.dev>,
Vlastimil Babka <vbabka@...e.cz>, Mike Rapoport <rppt@...nel.org>,
Suren Baghdasaryan <surenb@...gle.com>, Michal Hocko <mhocko@...e.com>,
David Rientjes <rientjes@...gle.com>,
Shakeel Butt <shakeel.butt@...ux.dev>,
Arnaldo Carvalho de Melo <acme@...nel.org>,
Namhyung Kim <namhyung@...nel.org>,
Mark Rutland <mark.rutland@....com>,
Alexander Shishkin <alexander.shishkin@...ux.intel.com>,
Jiri Olsa <jolsa@...nel.org>, Ian Rogers <irogers@...gle.com>,
Adrian Hunter <adrian.hunter@...el.com>,
Kan Liang <kan.liang@...ux.intel.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Oleg Nesterov <oleg@...hat.com>, Juri Lelli <juri.lelli@...hat.com>,
Vincent Guittot <vincent.guittot@...aro.org>,
Dietmar Eggemann <dietmar.eggemann@....com>,
Steven Rostedt <rostedt@...dmis.org>, Ben Segall <bsegall@...gle.com>,
Mel Gorman <mgorman@...e.de>, Valentin Schneider <vschneid@...hat.com>,
Jason Gunthorpe <jgg@...pe.ca>, John Hubbard <jhubbard@...dia.com>,
Peter Xu <peterx@...hat.com>, Jann Horn <jannh@...gle.com>,
Pedro Falcato <pfalcato@...e.de>, Matthew Wilcox <willy@...radead.org>,
Mateusz Guzik <mjguzik@...il.com>, linux-s390@...r.kernel.org,
linux-kernel@...r.kernel.org, sparclinux@...r.kernel.org,
linux-fsdevel@...r.kernel.org, linux-mm@...ck.org,
linux-trace-kernel@...r.kernel.org, linux-perf-users@...r.kernel.org
Subject: [PATCH 05/10] mm: convert uprobes to mm_flags_*() accessors
As part of the effort to move to mm->flags becoming a bitmap field, convert
existing users to making use of the mm_flags_*() accessors which will, when
the conversion is complete, be the only means of accessing mm_struct flags.
No functional change intended.
Signed-off-by: Lorenzo Stoakes <lorenzo.stoakes@...cle.com>
---
kernel/events/uprobes.c | 32 ++++++++++++++++----------------
1 file changed, 16 insertions(+), 16 deletions(-)
diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index 7ca1940607bd..31a12b60055f 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1153,15 +1153,15 @@ static int install_breakpoint(struct uprobe *uprobe, struct vm_area_struct *vma,
* set MMF_HAS_UPROBES in advance for uprobe_pre_sstep_notifier(),
* the task can hit this breakpoint right after __replace_page().
*/
- first_uprobe = !test_bit(MMF_HAS_UPROBES, &mm->flags);
+ first_uprobe = !mm_flags_test(MMF_HAS_UPROBES, mm);
if (first_uprobe)
- set_bit(MMF_HAS_UPROBES, &mm->flags);
+ mm_flags_set(MMF_HAS_UPROBES, mm);
ret = set_swbp(&uprobe->arch, vma, vaddr);
if (!ret)
- clear_bit(MMF_RECALC_UPROBES, &mm->flags);
+ mm_flags_clear(MMF_RECALC_UPROBES, mm);
else if (first_uprobe)
- clear_bit(MMF_HAS_UPROBES, &mm->flags);
+ mm_flags_clear(MMF_HAS_UPROBES, mm);
return ret;
}
@@ -1171,7 +1171,7 @@ static int remove_breakpoint(struct uprobe *uprobe, struct vm_area_struct *vma,
{
struct mm_struct *mm = vma->vm_mm;
- set_bit(MMF_RECALC_UPROBES, &mm->flags);
+ mm_flags_set(MMF_RECALC_UPROBES, mm);
return set_orig_insn(&uprobe->arch, vma, vaddr);
}
@@ -1303,7 +1303,7 @@ register_for_each_vma(struct uprobe *uprobe, struct uprobe_consumer *new)
/* consult only the "caller", new consumer. */
if (consumer_filter(new, mm))
err = install_breakpoint(uprobe, vma, info->vaddr);
- } else if (test_bit(MMF_HAS_UPROBES, &mm->flags)) {
+ } else if (mm_flags_test(MMF_HAS_UPROBES, mm)) {
if (!filter_chain(uprobe, mm))
err |= remove_breakpoint(uprobe, vma, info->vaddr);
}
@@ -1595,7 +1595,7 @@ int uprobe_mmap(struct vm_area_struct *vma)
if (vma->vm_file &&
(vma->vm_flags & (VM_WRITE|VM_SHARED)) == VM_WRITE &&
- test_bit(MMF_HAS_UPROBES, &vma->vm_mm->flags))
+ mm_flags_test(MMF_HAS_UPROBES, vma->vm_mm))
delayed_ref_ctr_inc(vma);
if (!valid_vma(vma, true))
@@ -1655,12 +1655,12 @@ void uprobe_munmap(struct vm_area_struct *vma, unsigned long start, unsigned lon
if (!atomic_read(&vma->vm_mm->mm_users)) /* called by mmput() ? */
return;
- if (!test_bit(MMF_HAS_UPROBES, &vma->vm_mm->flags) ||
- test_bit(MMF_RECALC_UPROBES, &vma->vm_mm->flags))
+ if (!mm_flags_test(MMF_HAS_UPROBES, vma->vm_mm) ||
+ mm_flags_test(MMF_RECALC_UPROBES, vma->vm_mm))
return;
if (vma_has_uprobes(vma, start, end))
- set_bit(MMF_RECALC_UPROBES, &vma->vm_mm->flags);
+ mm_flags_set(MMF_RECALC_UPROBES, vma->vm_mm);
}
static vm_fault_t xol_fault(const struct vm_special_mapping *sm,
@@ -1823,10 +1823,10 @@ void uprobe_end_dup_mmap(void)
void uprobe_dup_mmap(struct mm_struct *oldmm, struct mm_struct *newmm)
{
- if (test_bit(MMF_HAS_UPROBES, &oldmm->flags)) {
- set_bit(MMF_HAS_UPROBES, &newmm->flags);
+ if (mm_flags_test(MMF_HAS_UPROBES, oldmm)) {
+ mm_flags_set(MMF_HAS_UPROBES, newmm);
/* unconditionally, dup_mmap() skips VM_DONTCOPY vmas */
- set_bit(MMF_RECALC_UPROBES, &newmm->flags);
+ mm_flags_set(MMF_RECALC_UPROBES, newmm);
}
}
@@ -2370,7 +2370,7 @@ static void mmf_recalc_uprobes(struct mm_struct *mm)
return;
}
- clear_bit(MMF_HAS_UPROBES, &mm->flags);
+ mm_flags_clear(MMF_HAS_UPROBES, mm);
}
static int is_trap_at_addr(struct mm_struct *mm, unsigned long vaddr)
@@ -2468,7 +2468,7 @@ static struct uprobe *find_active_uprobe_rcu(unsigned long bp_vaddr, int *is_swb
*is_swbp = -EFAULT;
}
- if (!uprobe && test_and_clear_bit(MMF_RECALC_UPROBES, &mm->flags))
+ if (!uprobe && mm_flags_test_and_clear(MMF_RECALC_UPROBES, mm))
mmf_recalc_uprobes(mm);
mmap_read_unlock(mm);
@@ -2818,7 +2818,7 @@ int uprobe_pre_sstep_notifier(struct pt_regs *regs)
if (!current->mm)
return 0;
- if (!test_bit(MMF_HAS_UPROBES, ¤t->mm->flags) &&
+ if (!mm_flags_test(MMF_HAS_UPROBES, current->mm) &&
(!current->utask || !current->utask->return_instances))
return 0;
--
2.50.1
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