From: Ingo Molnar <mingo@kernel.org>
To: linux-kernel@vger.kernel.org
Cc: Juergen Gross <jgross@suse.com>,
"H . Peter Anvin" <hpa@zytor.com>,
Linus Torvalds <torvalds@linux-foundation.org>,
Peter Zijlstra <peterz@infradead.org>,
Borislav Petkov <bp@alien8.de>,
Thomas Gleixner <tglx@linutronix.de>
Subject: [PATCH 02/41] x86/alternatives: Rename 'bp_refs' to 'int3_refs'
Date: Thu, 27 Mar 2025 21:53:15 +0100 [thread overview]
Message-ID: <20250327205355.378659-3-mingo@kernel.org> (raw)
In-Reply-To: <20250327205355.378659-1-mingo@kernel.org>
Signed-off-by: Ingo Molnar <mingo@kernel.org>
---
arch/x86/kernel/alternative.c | 14 +++++++-------
1 file changed, 7 insertions(+), 7 deletions(-)
diff --git a/arch/x86/kernel/alternative.c b/arch/x86/kernel/alternative.c
index 4e932e95c744..cb9ac69694fb 100644
--- a/arch/x86/kernel/alternative.c
+++ b/arch/x86/kernel/alternative.c
@@ -2476,14 +2476,14 @@ struct int3_patching_desc {
int nr_entries;
};
-static DEFINE_PER_CPU(atomic_t, bp_refs);
+static DEFINE_PER_CPU(atomic_t, int3_refs);
static struct int3_patching_desc bp_desc;
static __always_inline
struct int3_patching_desc *try_get_desc(void)
{
- atomic_t *refs = this_cpu_ptr(&bp_refs);
+ atomic_t *refs = this_cpu_ptr(&int3_refs);
if (!raw_atomic_inc_not_zero(refs))
return NULL;
@@ -2493,7 +2493,7 @@ struct int3_patching_desc *try_get_desc(void)
static __always_inline void put_desc(void)
{
- atomic_t *refs = this_cpu_ptr(&bp_refs);
+ atomic_t *refs = this_cpu_ptr(&int3_refs);
smp_mb__before_atomic();
raw_atomic_dec(refs);
@@ -2529,9 +2529,9 @@ noinstr int poke_int3_handler(struct pt_regs *regs)
* Having observed our INT3 instruction, we now must observe
* bp_desc with non-zero refcount:
*
- * bp_refs = 1 INT3
+ * int3_refs = 1 INT3
* WMB RMB
- * write INT3 if (bp_refs != 0)
+ * write INT3 if (int3_refs != 0)
*/
smp_rmb();
@@ -2638,7 +2638,7 @@ static void text_poke_bp_batch(struct text_poke_loc *tp, unsigned int nr_entries
* ensure reading a non-zero refcount provides up to date bp_desc data.
*/
for_each_possible_cpu(i)
- atomic_set_release(per_cpu_ptr(&bp_refs, i), 1);
+ atomic_set_release(per_cpu_ptr(&int3_refs, i), 1);
/*
* Function tracing can enable thousands of places that need to be
@@ -2760,7 +2760,7 @@ static void text_poke_bp_batch(struct text_poke_loc *tp, unsigned int nr_entries
* unused.
*/
for_each_possible_cpu(i) {
- atomic_t *refs = per_cpu_ptr(&bp_refs, i);
+ atomic_t *refs = per_cpu_ptr(&int3_refs, i);
if (unlikely(!atomic_dec_and_test(refs)))
atomic_cond_read_acquire(refs, !VAL);
--
2.45.2
next prev parent reply other threads:[~2025-03-27 20:54 UTC|newest]
Thread overview: 47+ messages / expand[flat|nested] mbox.gz Atom feed top
2025-03-27 20:53 [PATCH 00/41] Simplify, reorganize and clean up the x86 INT3 based batch-patching code (alternative.c) Ingo Molnar
2025-03-27 20:53 ` [PATCH 01/41] x86/alternatives: Rename 'struct bp_patching_desc' to 'struct int3_patching_desc' Ingo Molnar
2025-03-27 20:53 ` Ingo Molnar [this message]
2025-03-27 20:53 ` [PATCH 03/41] x86/alternatives: Rename 'text_poke_bp_batch()' to 'text_poke_int3_batch()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 04/41] x86/alternatives: Rename 'text_poke_bp()' to 'text_poke_int3()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 05/41] x86/alternatives: Rename 'poke_int3_handler()' to 'text_poke_int3_handler()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 06/41] x86/alternatives: Rename 'poking_mm' to 'text_poke_mm' Ingo Molnar
2025-03-27 20:53 ` [PATCH 07/41] x86/alternatives: Rename 'text_poke_addr' to 'text_poke_int3_addr' Ingo Molnar
2025-03-27 20:53 ` [PATCH 08/41] x86/alternatives: Rename 'poking_addr' to 'text_poke_addr' Ingo Molnar
2025-03-27 20:53 ` [PATCH 09/41] x86/alternatives: Rename 'bp_desc' to 'int3_desc' Ingo Molnar
2025-03-27 20:53 ` [PATCH 10/41] x86/alternatives: Remove duplicate 'text_poke_early()' prototype Ingo Molnar
2025-03-27 20:53 ` [PATCH 11/41] x86/alternatives: Update comments in int3_emulate_push() Ingo Molnar
2025-03-27 20:53 ` [PATCH 12/41] x86/alternatives: Remove the confusing, inaccurate & unnecessary 'temp_mm_state_t' abstraction Ingo Molnar
2025-03-27 20:53 ` [PATCH 13/41] x86/alternatives: Rename 'text_poke_flush()' to 'text_poke_int3_flush()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 14/41] x86/alternatives: Rename 'text_poke_finish()' to 'text_poke_int3_finish()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 15/41] x86/alternatives: Rename 'text_poke_queue()' to 'text_poke_int3_queue()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 16/41] x86/alternatives: Rename 'text_poke_loc_init()' to 'text_poke_int3_loc_init()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 17/41] x86/alternatives: Rename 'struct text_poke_loc' to 'struct text_poke_int3_loc' Ingo Molnar
2025-03-27 20:53 ` [PATCH 18/41] x86/alternatives: Rename 'struct int3_patching_desc' to 'struct text_poke_int3_vec' Ingo Molnar
2025-03-27 20:53 ` [PATCH 19/41] x86/alternatives: Rename 'int3_desc' to 'int3_vec' Ingo Molnar
2025-03-27 20:53 ` [PATCH 20/41] x86/alternatives: Add text_mutex) assert to text_poke_int3_flush() Ingo Molnar
2025-03-27 20:53 ` [PATCH 21/41] x86/alternatives: Assert that text_poke_int3_handler() can only ever handle 'tp_vec[]' based requests Ingo Molnar
2025-03-27 20:53 ` [PATCH 22/41] x86/alternatives: Use non-inverted logic instead of 'tp_order_fail()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 23/41] x86/alternatives: Remove the 'addr == NULL means forced-flush' hack from text_poke_int3_finish()/text_poke_int3_flush()/tp_addr_ordered() Ingo Molnar
2025-03-27 20:53 ` [PATCH 24/41] x86/alternatives: Simplify text_poke_int3() by using tp_vec and existing APIs Ingo Molnar
2025-03-27 20:53 ` [PATCH 25/41] x86/alternatives: Assert input parameters in text_poke_int3_batch() Ingo Molnar
2025-03-27 20:53 ` [PATCH 26/41] x86/alternatives: Introduce 'struct text_poke_int3_array' and move tp_vec and tp_vec_nr to it Ingo Molnar
2025-03-27 20:53 ` [PATCH 27/41] x86/alternatives: Remove the tp_vec indirection Ingo Molnar
2025-03-27 20:53 ` [PATCH 28/41] x86/alternatives: Rename 'try_get_desc()' to 'try_get_tp_array()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 29/41] x86/alternatives: Rename 'put_desc()' to 'put_tp_array()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 30/41] x86/alternatives: Simplify try_get_tp_array() Ingo Molnar
2025-03-27 20:53 ` [PATCH 31/41] x86/alternatives: Simplify text_poke_int3_handler() Ingo Molnar
2025-03-27 20:53 ` [PATCH 32/41] x86/alternatives: Simplify text_poke_int3_batch() Ingo Molnar
2025-03-27 20:53 ` [PATCH 33/41] x86/alternatives: Rename 'text_poke_int3_batch()' to 'text_poke_int3_batch_process()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 34/41] x86/alternatives: Rename 'int3_refs' to 'tp_array_refs' Ingo Molnar
2025-03-27 20:53 ` [PATCH 35/41] x86/alternatives: Move the tp_array manipulation into text_poke_int3_loc_init() and rename it to text_poke_int3_loc_add() Ingo Molnar
2025-03-27 20:53 ` [PATCH 36/41] x86/alternatives: Remove the mixed-patching restriction on text_poke_int3() Ingo Molnar
2025-03-27 20:53 ` [PATCH 37/41] x86/alternatives: Rename 'text_poke_int3()' to 'text_poke_int3_now()' Ingo Molnar
2025-03-27 20:53 ` [PATCH 38/41] x86/alternatives: Add documentation for text_poke_int3_queue() Ingo Molnar
2025-03-27 20:53 ` [PATCH 39/41] x86/alternatives: Move tp_array completion from text_poke_int3_finish() and text_poke_int3_flush() to text_poke_int3_batch_process() Ingo Molnar
2025-03-27 20:53 ` [PATCH 40/41] x86/alternatives: Rename 'text_poke_sync()' to 'text_poke_sync_each_cpu()' Ingo Molnar
2025-04-02 4:10 ` H. Peter Anvin
2025-04-03 15:05 ` Ingo Molnar
2025-03-27 20:53 ` [PATCH 41/41] x86/alternatives: Simplify tp_addr_ordered() Ingo Molnar
2025-03-27 22:19 ` [PATCH 00/41] Simplify, reorganize and clean up the x86 INT3 based batch-patching code (alternative.c) Linus Torvalds
2025-03-28 10:10 ` Ingo Molnar
2025-04-01 14:55 ` Peter Zijlstra
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20250327205355.378659-3-mingo@kernel.org \
--to=mingo@kernel.org \
--cc=bp@alien8.de \
--cc=hpa@zytor.com \
--cc=jgross@suse.com \
--cc=linux-kernel@vger.kernel.org \
--cc=peterz@infradead.org \
--cc=tglx@linutronix.de \
--cc=torvalds@linux-foundation.org \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox