linux-kernel - [PATCH v2 3/3] lib: Allow traceing of usercopy, xarray, iov_iter, find

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Message-Id: <20230525210040.3637-4-namit@vmware.com>
Date:   Thu, 25 May 2023 14:00:40 -0700
From:   Nadav Amit <nadav.amit@...il.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        "Arnd Bergmann" <arnd@...db.de>,
        "Thomas Gleixner" <tglx@...utronix.de>
Cc:     linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-ia64@...r.kernel.org, linux-um@...ts.infradead.org,
        Linux-Arch <linux-arch@...r.kernel.org>, linux-mm@...ck.org,
        "Andy Lutomirski" <luto@...nel.org>,
        "Ingo Molnar" <mingo@...hat.com>,
        "Dave Hansen" <dave.hansen@...ux.intel.com>,
        "Borislav Petkov" <bp@...en8.de>, x86@...nel.org,
        Peter Zijlstra <peterz@...radead.org>,
        Nadav Amit <namit@...are.com>
Subject: [PATCH v2 3/3] lib: Allow traceing of usercopy, xarray, iov_iter, find_bit

From: Nadav Amit <namit@...are.com>

There is no reason not to allow the use of ftrace for usercopy, xarray
and iov_iter.  Enable tracing for these compilation unit.

Signed-off-by: Nadav Amit <namit@...are.com>
---
 lib/Makefile | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/lib/Makefile b/lib/Makefile
index 876fcdeae34e..00450e1cc97d 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -27,6 +27,9 @@ KASAN_SANITIZE_string.o := n
 CFLAGS_string.o += -fno-stack-protector
 endif
 
+CFLAGS_xarray.o += $(CC_FLAGS_FTRACE)
+CFLAGS_iov_iter.o += $(CC_FLAGS_FTRACE)
+
 lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 rbtree.o radix-tree.o timerqueue.o xarray.o \
 	 maple_tree.o idr.o extable.o irq_regs.o argv_split.o \
@@ -42,6 +45,8 @@ lib-$(CONFIG_SMP) += cpumask.o
 lib-y	+= kobject.o klist.o
 obj-y	+= lockref.o
 
+CFLAGS_usercopy.o += $(CC_FLAGS_FTRACE)
+CFLAGS_find_bit.o += $(CC_FLAGS_FTRACE)
 obj-y += bcd.o sort.o parser.o debug_locks.o random32.o \
 	 bust_spinlocks.o kasprintf.o bitmap.o scatterlist.o \
 	 list_sort.o uuid.o iov_iter.o clz_ctz.o \
-- 
2.25.1