linux-kernel - [PATCH 2/3] lib/usercopy: Allow traceing of usercopy, xarray, iov

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Message-Id: <20221122195329.252654-3-namit@vmware.com>
Date:   Tue, 22 Nov 2022 11:53:28 -0800
From:   Nadav Amit <nadav.amit@...il.com>
To:     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@...r.kernel.org, linux-mm@...ck.org,
        Andy Lutomirski <luto@...nel.org>,
        Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
        Dave Hansen <dave.hansen@...ux.intel.com>, x86@...nel.org,
        Richard Weinberger <richard@....at>,
        Anton Ivanov <anton.ivanov@...bridgegreys.com>,
        Johannes Berg <johannes@...solutions.net>,
        Arnd Bergmann <arnd@...db.de>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Nadav Amit <namit@...are.com>
Subject: [PATCH 2/3] lib/usercopy: Allow traceing of usercopy, xarray, iov_iter

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 | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/lib/Makefile b/lib/Makefile
index 59bd7c2f793a..32766aa26670 100644
--- a/lib/Makefile
+++ b/lib/Makefile
@@ -27,6 +27,8 @@ KASAN_SANITIZE_string.o := n
 CFLAGS_string.o += -fno-stack-protector
 endif
 
+CFLAGS_xarray.o += $(CC_FLAGS_FTRACE)
+CFLAGS_iov_iter.o += $(CC_FLAGS_FTRACE)
 lib-y := ctype.o string.o vsprintf.o cmdline.o \
 	 rbtree.o radix-tree.o timerqueue.o xarray.o \
 	 maple_tree.o idr.o extable.o irq_regs.o argv_split.o \
@@ -42,6 +44,7 @@ lib-$(CONFIG_SMP) += cpumask.o
 lib-y	+= kobject.o klist.o
 obj-y	+= lockref.o
 
+CFLAGS_usercopy.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