linux-kernel - [PATCH v4 6/7] kprobes: Use text_alloc() and text

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Date:   Fri, 17 Jul 2020 06:04:20 +0300
From:   Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
To:     linux-kernel@...r.kernel.org
Cc:     Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>,
        Andi Kleen <ak@...ux.intel.com>,
        Masami Hiramatsu <mhiramat@...nel.org>,
        "Naveen N. Rao" <naveen.n.rao@...ux.ibm.com>,
        Anil S Keshavamurthy <anil.s.keshavamurthy@...el.com>,
        "David S. Miller" <davem@...emloft.net>
Subject: [PATCH v4 6/7] kprobes: Use text_alloc() and text_free()

Use text_alloc() and text_free(). Those arch's that provide their
allocators will benefit from this because they can provide their custom
allocator and render out the compile time dep to the module subsystem.
Other arch's will continue to work as the fallback implementations call
module_alloc() and module_memfree().

Cc: Andi Kleen <ak@...ux.intel.com>
Cc: Masami Hiramatsu <mhiramat@...nel.org>
Signed-off-by: Jarkko Sakkinen <jarkko.sakkinen@...ux.intel.com>
---
 kernel/kprobes.c | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/kprobes.c b/kernel/kprobes.c
index 4e46d96d4e16..f73cf71ef47d 100644
--- a/kernel/kprobes.c
+++ b/kernel/kprobes.c
@@ -40,6 +40,7 @@
 #include <asm/cacheflush.h>
 #include <asm/errno.h>
 #include <linux/uaccess.h>
+#include <linux/vmalloc.h>
 
 #define KPROBE_HASH_BITS 6
 #define KPROBE_TABLE_SIZE (1 << KPROBE_HASH_BITS)
@@ -111,12 +112,12 @@ enum kprobe_slot_state {
 
 void __weak *alloc_insn_page(void)
 {
-	return module_alloc(PAGE_SIZE);
+	return text_alloc(PAGE_SIZE);
 }
 
 void __weak free_insn_page(void *page)
 {
-	module_memfree(page);
+	text_free(page);
 }
 
 struct kprobe_insn_cache kprobe_insn_slots = {
-- 
2.25.1