linux-kernel - [PATCH v2 1/5] powerpc/vdso: Remove DBG()

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Message-Id: <0f65bb24a2519e5e6c33089016cb249a7c1b1e35.1598594308.git.christophe.leroy@csgroup.eu>
Date:   Fri, 28 Aug 2020 05:58:46 +0000 (UTC)
From:   Christophe Leroy <christophe.leroy@...roup.eu>
To:     Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        Paul Mackerras <paulus@...ba.org>,
        Michael Ellerman <mpe@...erman.id.au>
Cc:     linux-kernel@...r.kernel.org, linuxppc-dev@...ts.ozlabs.org
Subject: [PATCH v2 1/5] powerpc/vdso: Remove DBG()

DBG() is defined as void when DEBUG is not defined,
and DEBUG is explicitly undefined.

It means there is no other way than modifying source code
to get the messages printed.

It was most likely useful in the first days of VDSO, but
today the only 3 DBG() calls don't deserve a special
handling.

Just remove them. If one day someone need such messages back,
use a standard pr_debug() or equivalent.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
This is a follow up series, applying on top of the series that
switches powerpc VDSO to _install_special_mapping(),
rebased on today's powerpc/next-test (dd419a93bd99)

v2 removes the modification to arch_setup_additional_pages() to
consider when is_32bit_task() returning true when CONFIG_VDSO32
not set, as this should never happen.

Signed-off-by: Christophe Leroy <christophe.leroy@...roup.eu>
---
 arch/powerpc/kernel/vdso.c | 13 -------------
 1 file changed, 13 deletions(-)

diff --git a/arch/powerpc/kernel/vdso.c b/arch/powerpc/kernel/vdso.c
index e2568d9ecdff..3ef3fc546ac8 100644
--- a/arch/powerpc/kernel/vdso.c
+++ b/arch/powerpc/kernel/vdso.c
@@ -31,14 +31,6 @@
 #include <asm/vdso_datapage.h>
 #include <asm/setup.h>
 
-#undef DEBUG
-
-#ifdef DEBUG
-#define DBG(fmt...) printk(fmt)
-#else
-#define DBG(fmt...)
-#endif
-
 /* Max supported size for symbol names */
 #define MAX_SYMNAME	64
 
@@ -567,9 +559,6 @@ static __init int vdso_fixup_alt_funcs(struct lib32_elfinfo *v32,
 		if (!match)
 			continue;
 
-		DBG("replacing %s with %s...\n", patch->gen_name,
-		    patch->fix_name ? "NONE" : patch->fix_name);
-
 		/*
 		 * Patch the 32 bits and 64 bits symbols. Note that we do not
 		 * patch the "." symbol on 64 bits.
@@ -704,7 +693,6 @@ static int __init vdso_init(void)
 	 * Calculate the size of the 64 bits vDSO
 	 */
 	vdso64_pages = (&vdso64_end - &vdso64_start) >> PAGE_SHIFT;
-	DBG("vdso64_kbase: %p, 0x%x pages\n", vdso64_kbase, vdso64_pages);
 
 	vdso32_kbase = &vdso32_start;
 
@@ -712,7 +700,6 @@ static int __init vdso_init(void)
 	 * Calculate the size of the 32 bits vDSO
 	 */
 	vdso32_pages = (&vdso32_end - &vdso32_start) >> PAGE_SHIFT;
-	DBG("vdso32_kbase: %p, 0x%x pages\n", vdso32_kbase, vdso32_pages);
 
 	/*
 	 * Setup the syscall map in the vDOS
-- 
2.25.0