linux-kernel - [tip: perf/core] uprobes: fold xol_take_insn_slot() into xol_get_insn

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Message-ID: <172838551018.1442.3527533027258106388.tip-bot2@tip-bot2>
Date: Tue, 08 Oct 2024 11:05:10 -0000
From: "tip-bot2 for Oleg Nesterov" <tip-bot2@...utronix.de>
To: linux-tip-commits@...r.kernel.org
Cc: Oleg Nesterov <oleg@...hat.com>,
 "Peter Zijlstra (Intel)" <peterz@...radead.org>,
 Andrii Nakryiko <andrii@...nel.org>, x86@...nel.org,
 linux-kernel@...r.kernel.org
Subject:
 [tip: perf/core] uprobes: fold xol_take_insn_slot() into xol_get_insn_slot()

The following commit has been merged into the perf/core branch of tip:

Commit-ID:     6c74ca7aa81a23c613b8ca52bfe0a4b3734dd287
Gitweb:        https://git.kernel.org/tip/6c74ca7aa81a23c613b8ca52bfe0a4b3734dd287
Author:        Oleg Nesterov <oleg@...hat.com>
AuthorDate:    Tue, 01 Oct 2024 16:25:03 +02:00
Committer:     Peter Zijlstra <peterz@...radead.org>
CommitterDate: Mon, 07 Oct 2024 09:28:45 +02:00

uprobes: fold xol_take_insn_slot() into xol_get_insn_slot()

After the previous change xol_take_insn_slot() becomes trivial, kill it.

Signed-off-by: Oleg Nesterov <oleg@...hat.com>
Signed-off-by: Peter Zijlstra (Intel) <peterz@...radead.org>
Acked-by: Andrii Nakryiko <andrii@...nel.org>
Link: https://lore.kernel.org/r/20241001142503.GA13633@redhat.com
---
 kernel/events/uprobes.c | 17 ++++-------------
 1 file changed, 4 insertions(+), 13 deletions(-)

diff --git a/kernel/events/uprobes.c b/kernel/events/uprobes.c
index a1c801e..2a00594 100644
--- a/kernel/events/uprobes.c
+++ b/kernel/events/uprobes.c
@@ -1641,28 +1641,19 @@ static unsigned long xol_get_slot_nr(struct xol_area *area)
 }
 
 /*
- *  - search for a free slot.
- */
-static unsigned long xol_take_insn_slot(struct xol_area *area)
-{
-	unsigned long slot_nr;
-
-	wait_event(area->wq, (slot_nr = xol_get_slot_nr(area)) < UINSNS_PER_PAGE);
-
-	return area->vaddr + slot_nr * UPROBE_XOL_SLOT_BYTES;
-}
-
-/*
  * xol_get_insn_slot - allocate a slot for xol.
  */
 static bool xol_get_insn_slot(struct uprobe *uprobe, struct uprobe_task *utask)
 {
 	struct xol_area *area = get_xol_area();
+	unsigned long slot_nr;
 
 	if (!area)
 		return false;
 
-	utask->xol_vaddr = xol_take_insn_slot(area);
+	wait_event(area->wq, (slot_nr = xol_get_slot_nr(area)) < UINSNS_PER_PAGE);
+
+	utask->xol_vaddr = area->vaddr + slot_nr * UPROBE_XOL_SLOT_BYTES;
 	arch_uprobe_copy_ixol(area->page, utask->xol_vaddr,
 			      &uprobe->arch.ixol, sizeof(uprobe->arch.ixol));
 	return true;