From: Jessica Yu <jeyu@kernel.org>
To: Christoph Hellwig <hch@lst.de>
Cc: Frederic Barrat <fbarrat@linux.ibm.com>,
Andrew Donnellan <ajd@linux.ibm.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@linux.ie>, Daniel Vetter <daniel@ffwll.ch>,
Josh Poimboeuf <jpoimboe@redhat.com>,
Jiri Kosina <jikos@kernel.org>, Miroslav Benes <mbenes@suse.cz>,
Petr Mladek <pmladek@suse.com>,
Joe Lawrence <joe.lawrence@redhat.com>,
Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>,
linux-kernel@vger.kernel.org, linuxppc-dev@lists.ozlabs.org,
dri-devel@lists.freedesktop.org, live-patching@vger.kernel.org,
linux-kbuild@vger.kernel.org
Subject: Re: [PATCH 13/13] module: remove EXPORY_UNUSED_SYMBOL*
Date: Wed, 27 Jan 2021 14:49:38 +0100 [thread overview]
Message-ID: <YBFvcmUiHRjkucbf@gunter> (raw)
In-Reply-To: <20210121074959.313333-14-hch@lst.de>
+++ Christoph Hellwig [21/01/21 08:49 +0100]:
>EXPORT_UNUSED_SYMBOL* is not actually used anywhere. Remove the
>unused functionality as we generally just remove unused code anyway.
>
>Signed-off-by: Christoph Hellwig <hch@lst.de>
>---
> arch/arm/configs/bcm2835_defconfig | 1 -
> arch/arm/configs/mxs_defconfig | 1 -
> arch/mips/configs/nlm_xlp_defconfig | 1 -
> arch/mips/configs/nlm_xlr_defconfig | 1 -
> arch/parisc/configs/generic-32bit_defconfig | 1 -
> arch/parisc/configs/generic-64bit_defconfig | 1 -
> arch/powerpc/configs/ppc6xx_defconfig | 1 -
> arch/s390/configs/debug_defconfig | 1 -
> arch/s390/configs/defconfig | 1 -
> arch/sh/configs/edosk7760_defconfig | 1 -
> arch/sh/configs/sdk7780_defconfig | 1 -
> arch/x86/configs/i386_defconfig | 1 -
> arch/x86/configs/x86_64_defconfig | 1 -
> arch/x86/tools/relocs.c | 4 +-
> include/asm-generic/vmlinux.lds.h | 28 ---------
> include/linux/export.h | 8 ---
> include/linux/module.h | 13 ----
> init/Kconfig | 17 -----
> kernel/module.c | 69 ++-------------------
> scripts/checkpatch.pl | 6 +-
> scripts/mod/modpost.c | 39 +-----------
> scripts/mod/modpost.h | 2 -
> scripts/module.lds.S | 4 --
> tools/include/linux/export.h | 2 -
> 24 files changed, 13 insertions(+), 192 deletions(-)
>
>diff --git a/arch/arm/configs/bcm2835_defconfig b/arch/arm/configs/bcm2835_defconfig
>index 44ff9cd88d8161..d6c6c2e031c43a 100644
>--- a/arch/arm/configs/bcm2835_defconfig
>+++ b/arch/arm/configs/bcm2835_defconfig
>@@ -177,7 +177,6 @@ CONFIG_BOOT_PRINTK_DELAY=y
> CONFIG_DYNAMIC_DEBUG=y
> CONFIG_DEBUG_INFO=y
> # CONFIG_ENABLE_MUST_CHECK is not set
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_DEBUG_MEMORY_INIT=y
> CONFIG_LOCKUP_DETECTOR=y
> CONFIG_SCHED_TRACER=y
>diff --git a/arch/arm/configs/mxs_defconfig b/arch/arm/configs/mxs_defconfig
>index a9c6f32a9b1c9d..ca32446b187f5d 100644
>--- a/arch/arm/configs/mxs_defconfig
>+++ b/arch/arm/configs/mxs_defconfig
>@@ -164,7 +164,6 @@ CONFIG_FONTS=y
> CONFIG_PRINTK_TIME=y
> CONFIG_DEBUG_INFO=y
> CONFIG_FRAME_WARN=2048
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_KERNEL=y
> CONFIG_SOFTLOCKUP_DETECTOR=y
>diff --git a/arch/mips/configs/nlm_xlp_defconfig b/arch/mips/configs/nlm_xlp_defconfig
>index 72a211d2d556fd..32c29061172325 100644
>--- a/arch/mips/configs/nlm_xlp_defconfig
>+++ b/arch/mips/configs/nlm_xlp_defconfig
>@@ -549,7 +549,6 @@ CONFIG_PRINTK_TIME=y
> CONFIG_DEBUG_INFO=y
> # CONFIG_ENABLE_MUST_CHECK is not set
> CONFIG_FRAME_WARN=1024
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_DEBUG_MEMORY_INIT=y
> CONFIG_DETECT_HUNG_TASK=y
> CONFIG_SCHEDSTATS=y
>diff --git a/arch/mips/configs/nlm_xlr_defconfig b/arch/mips/configs/nlm_xlr_defconfig
>index 4ecb157e56d427..bf9b9244929ecd 100644
>--- a/arch/mips/configs/nlm_xlr_defconfig
>+++ b/arch/mips/configs/nlm_xlr_defconfig
>@@ -500,7 +500,6 @@ CONFIG_CRC7=m
> CONFIG_PRINTK_TIME=y
> CONFIG_DEBUG_INFO=y
> # CONFIG_ENABLE_MUST_CHECK is not set
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_DEBUG_MEMORY_INIT=y
> CONFIG_DETECT_HUNG_TASK=y
> CONFIG_SCHEDSTATS=y
>diff --git a/arch/parisc/configs/generic-32bit_defconfig b/arch/parisc/configs/generic-32bit_defconfig
>index 3cbcfad5f7249d..7611d48c599e01 100644
>--- a/arch/parisc/configs/generic-32bit_defconfig
>+++ b/arch/parisc/configs/generic-32bit_defconfig
>@@ -22,7 +22,6 @@ CONFIG_PCI_LBA=y
> CONFIG_MODULES=y
> CONFIG_MODULE_UNLOAD=y
> CONFIG_MODULE_FORCE_UNLOAD=y
>-CONFIG_UNUSED_SYMBOLS=y
> # CONFIG_BLK_DEV_BSG is not set
> # CONFIG_CORE_DUMP_DEFAULT_ELF_HEADERS is not set
> CONFIG_BINFMT_MISC=m
>diff --git a/arch/parisc/configs/generic-64bit_defconfig b/arch/parisc/configs/generic-64bit_defconfig
>index 8f81fcbf04c413..53054b81461a10 100644
>--- a/arch/parisc/configs/generic-64bit_defconfig
>+++ b/arch/parisc/configs/generic-64bit_defconfig
>@@ -31,7 +31,6 @@ CONFIG_MODULE_FORCE_LOAD=y
> CONFIG_MODULE_UNLOAD=y
> CONFIG_MODULE_FORCE_UNLOAD=y
> CONFIG_MODVERSIONS=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_BLK_DEV_INTEGRITY=y
> CONFIG_BINFMT_MISC=m
> # CONFIG_COMPACTION is not set
>diff --git a/arch/powerpc/configs/ppc6xx_defconfig b/arch/powerpc/configs/ppc6xx_defconfig
>index ef09f3cce1fa85..34c3859040f9f7 100644
>--- a/arch/powerpc/configs/ppc6xx_defconfig
>+++ b/arch/powerpc/configs/ppc6xx_defconfig
>@@ -1072,7 +1072,6 @@ CONFIG_NLS_ISO8859_15=m
> CONFIG_NLS_KOI8_R=m
> CONFIG_NLS_KOI8_U=m
> CONFIG_DEBUG_INFO=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_HEADERS_INSTALL=y
> CONFIG_MAGIC_SYSRQ=y
> CONFIG_DEBUG_KERNEL=y
>diff --git a/arch/s390/configs/debug_defconfig b/arch/s390/configs/debug_defconfig
>index c4f6ff98a612cd..58e54d17e3154b 100644
>--- a/arch/s390/configs/debug_defconfig
>+++ b/arch/s390/configs/debug_defconfig
>@@ -71,7 +71,6 @@ CONFIG_MODULE_FORCE_UNLOAD=y
> CONFIG_MODVERSIONS=y
> CONFIG_MODULE_SRCVERSION_ALL=y
> CONFIG_MODULE_SIG_SHA256=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_BLK_DEV_INTEGRITY=y
> CONFIG_BLK_DEV_THROTTLING=y
> CONFIG_BLK_WBT=y
>diff --git a/arch/s390/configs/defconfig b/arch/s390/configs/defconfig
>index 51135893cffe34..b5e62c0d3e23e0 100644
>--- a/arch/s390/configs/defconfig
>+++ b/arch/s390/configs/defconfig
>@@ -66,7 +66,6 @@ CONFIG_MODULE_FORCE_UNLOAD=y
> CONFIG_MODVERSIONS=y
> CONFIG_MODULE_SRCVERSION_ALL=y
> CONFIG_MODULE_SIG_SHA256=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_BLK_DEV_THROTTLING=y
> CONFIG_BLK_WBT=y
> CONFIG_BLK_CGROUP_IOLATENCY=y
>diff --git a/arch/sh/configs/edosk7760_defconfig b/arch/sh/configs/edosk7760_defconfig
>index 02ba622985769d..d77f54e906fd04 100644
>--- a/arch/sh/configs/edosk7760_defconfig
>+++ b/arch/sh/configs/edosk7760_defconfig
>@@ -102,7 +102,6 @@ CONFIG_NLS_UTF8=y
> CONFIG_PRINTK_TIME=y
> # CONFIG_ENABLE_MUST_CHECK is not set
> CONFIG_MAGIC_SYSRQ=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_DEBUG_KERNEL=y
> CONFIG_DEBUG_SHIRQ=y
> CONFIG_DETECT_HUNG_TASK=y
>diff --git a/arch/sh/configs/sdk7780_defconfig b/arch/sh/configs/sdk7780_defconfig
>index d10a0414123a51..d53c4595fb2e98 100644
>--- a/arch/sh/configs/sdk7780_defconfig
>+++ b/arch/sh/configs/sdk7780_defconfig
>@@ -130,7 +130,6 @@ CONFIG_NLS_ISO8859_15=y
> CONFIG_NLS_UTF8=y
> # CONFIG_ENABLE_MUST_CHECK is not set
> CONFIG_MAGIC_SYSRQ=y
>-CONFIG_UNUSED_SYMBOLS=y
> CONFIG_DEBUG_KERNEL=y
> CONFIG_DETECT_HUNG_TASK=y
> # CONFIG_SCHED_DEBUG is not set
>diff --git a/arch/x86/configs/i386_defconfig b/arch/x86/configs/i386_defconfig
>index 78210793d357cf..9c9c4a888b1dbf 100644
>--- a/arch/x86/configs/i386_defconfig
>+++ b/arch/x86/configs/i386_defconfig
>@@ -50,7 +50,6 @@ CONFIG_JUMP_LABEL=y
> CONFIG_MODULES=y
> CONFIG_MODULE_UNLOAD=y
> CONFIG_MODULE_FORCE_UNLOAD=y
>-# CONFIG_UNUSED_SYMBOLS is not set
> CONFIG_BINFMT_MISC=y
> CONFIG_NET=y
> CONFIG_PACKET=y
>diff --git a/arch/x86/configs/x86_64_defconfig b/arch/x86/configs/x86_64_defconfig
>index 9936528e19393a..b60bd2d8603499 100644
>--- a/arch/x86/configs/x86_64_defconfig
>+++ b/arch/x86/configs/x86_64_defconfig
>@@ -48,7 +48,6 @@ CONFIG_JUMP_LABEL=y
> CONFIG_MODULES=y
> CONFIG_MODULE_UNLOAD=y
> CONFIG_MODULE_FORCE_UNLOAD=y
>-# CONFIG_UNUSED_SYMBOLS is not set
> CONFIG_BINFMT_MISC=y
> CONFIG_NET=y
> CONFIG_PACKET=y
>diff --git a/arch/x86/tools/relocs.c b/arch/x86/tools/relocs.c
>index 0d210d0e83e241..b9c577a3cacca6 100644
>--- a/arch/x86/tools/relocs.c
>+++ b/arch/x86/tools/relocs.c
>@@ -61,8 +61,8 @@ static const char * const sym_regex_kernel[S_NSYMTYPES] = {
> "(__iommu_table|__apicdrivers|__smp_locks)(|_end)|"
> "__(start|end)_pci_.*|"
> "__(start|end)_builtin_fw|"
>- "__(start|stop)___ksymtab(|_gpl|_unused|_unused_gpl)|"
>- "__(start|stop)___kcrctab(|_gpl|_unused|_unused_gpl)|"
>+ "__(start|stop)___ksymtab(|_gpl)|"
>+ "__(start|stop)___kcrctab(|_gpl)|"
> "__(start|stop)___param|"
> "__(start|stop)___modver|"
> "__(start|stop)___bug_table|"
>diff --git a/include/asm-generic/vmlinux.lds.h b/include/asm-generic/vmlinux.lds.h
>index 83243506e68b00..1fa338ac6a5477 100644
>--- a/include/asm-generic/vmlinux.lds.h
>+++ b/include/asm-generic/vmlinux.lds.h
>@@ -481,20 +481,6 @@
> __stop___ksymtab_gpl = .; \
> } \
> \
>- /* Kernel symbol table: Normal unused symbols */ \
>- __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
>- __start___ksymtab_unused = .; \
>- KEEP(*(SORT(___ksymtab_unused+*))) \
>- __stop___ksymtab_unused = .; \
>- } \
>- \
>- /* Kernel symbol table: GPL-only unused symbols */ \
>- __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
>- __start___ksymtab_unused_gpl = .; \
>- KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
>- __stop___ksymtab_unused_gpl = .; \
>- } \
>- \
> /* Kernel symbol table: Normal symbols */ \
> __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
> __start___kcrctab = .; \
>@@ -509,20 +495,6 @@
> __stop___kcrctab_gpl = .; \
> } \
> \
>- /* Kernel symbol table: Normal unused symbols */ \
>- __kcrctab_unused : AT(ADDR(__kcrctab_unused) - LOAD_OFFSET) { \
>- __start___kcrctab_unused = .; \
>- KEEP(*(SORT(___kcrctab_unused+*))) \
>- __stop___kcrctab_unused = .; \
>- } \
>- \
>- /* Kernel symbol table: GPL-only unused symbols */ \
>- __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
>- __start___kcrctab_unused_gpl = .; \
>- KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
>- __stop___kcrctab_unused_gpl = .; \
>- } \
>- \
> /* Kernel symbol table: strings */ \
> __ksymtab_strings : AT(ADDR(__ksymtab_strings) - LOAD_OFFSET) { \
> *(__ksymtab_strings) \
>diff --git a/include/linux/export.h b/include/linux/export.h
>index 362b64f8d4a7c2..6271a5d9c988fa 100644
>--- a/include/linux/export.h
>+++ b/include/linux/export.h
>@@ -160,14 +160,6 @@ struct kernel_symbol {
> #define EXPORT_SYMBOL_NS(sym, ns) __EXPORT_SYMBOL(sym, "", #ns)
> #define EXPORT_SYMBOL_NS_GPL(sym, ns) __EXPORT_SYMBOL(sym, "_gpl", #ns)
>
>-#ifdef CONFIG_UNUSED_SYMBOLS
>-#define EXPORT_UNUSED_SYMBOL(sym) _EXPORT_SYMBOL(sym, "_unused")
>-#define EXPORT_UNUSED_SYMBOL_GPL(sym) _EXPORT_SYMBOL(sym, "_unused_gpl")
>-#else
>-#define EXPORT_UNUSED_SYMBOL(sym)
>-#define EXPORT_UNUSED_SYMBOL_GPL(sym)
>-#endif
>-
> #endif /* !__ASSEMBLY__ */
>
> #endif /* _LINUX_EXPORT_H */
>diff --git a/include/linux/module.h b/include/linux/module.h
>index 8f4d577d4707c2..0e70596c9a704a 100644
>--- a/include/linux/module.h
>+++ b/include/linux/module.h
>@@ -392,18 +392,6 @@ struct module {
> const s32 *gpl_crcs;
> bool using_gplonly_symbols;
>
>-#ifdef CONFIG_UNUSED_SYMBOLS
>- /* unused exported symbols. */
>- const struct kernel_symbol *unused_syms;
>- const s32 *unused_crcs;
>- unsigned int num_unused_syms;
>-
>- /* GPL-only, unused exported symbols. */
>- unsigned int num_unused_gpl_syms;
>- const struct kernel_symbol *unused_gpl_syms;
>- const s32 *unused_gpl_crcs;
>-#endif
>-
> #ifdef CONFIG_MODULE_SIG
> /* Signature was verified. */
> bool sig_ok;
>@@ -592,7 +580,6 @@ struct symsearch {
> GPL_ONLY,
> WILL_BE_GPL_ONLY,
> } license;
>- bool unused;
> };
Thanks for the cleanups. While we're here, I noticed that struct
symsearch is only used internally in kernel/module.c, so I don't think
it actually needs to be in include/linux/module.h. I don't see it used
anywhere else. We could move maybe that to kernel/module-internal.h.
next prev parent reply other threads:[~2021-01-27 13:51 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-01-21 7:49 module loader dead code removal and cleanusp Christoph Hellwig
2021-01-21 7:49 ` [PATCH 01/13] powerpc/powernv: remove get_cxl_module Christoph Hellwig
2021-01-21 9:09 ` Andrew Donnellan
2021-01-21 7:49 ` [PATCH 02/13] module: add a module_loaded helper Christoph Hellwig
2021-01-21 10:00 ` Christophe Leroy
2021-01-21 17:11 ` Christoph Hellwig
2021-01-21 17:44 ` David Laight
2021-01-21 7:49 ` [PATCH 03/13] livepatch: refactor klp_init_object Christoph Hellwig
2021-01-27 12:58 ` Petr Mladek
2021-01-28 16:22 ` Christoph Hellwig
2021-01-28 16:24 ` Christoph Hellwig
2021-01-21 7:49 ` [PATCH 04/13] livepatch: move klp_find_object_module to module.c Christoph Hellwig
2021-01-21 21:45 ` Josh Poimboeuf
2021-01-26 14:25 ` Jessica Yu
2021-01-27 11:55 ` Petr Mladek
2021-01-21 7:49 ` [PATCH 05/13] kallsyms: refactor {,module_}kallsyms_on_each_symbol Christoph Hellwig
2021-01-21 7:49 ` [PATCH 06/13] kallsyms: only build {,module_}kallsyms_on_each_symbol when required Christoph Hellwig
2021-01-21 7:49 ` [PATCH 07/13] module: mark module_mutex static Christoph Hellwig
2021-01-21 7:49 ` [PATCH 08/13] drm: remove drm_fb_helper_modinit Christoph Hellwig
2021-01-21 8:25 ` Daniel Vetter
2021-01-21 8:28 ` Christoph Hellwig
2021-01-21 8:39 ` Daniel Vetter
2021-01-21 7:49 ` [PATCH 09/13] module: remove each_symbol_in_section Christoph Hellwig
2021-01-21 7:49 ` [PATCH 10/13] module: merge each_symbol_section into find_symbol Christoph Hellwig
2021-01-21 7:49 ` [PATCH 11/13] module: pass struct find_symbol_args to find_symbol Christoph Hellwig
2021-01-21 7:49 ` [PATCH 12/13] module: remove EXPORT_SYMBOL_GPL_FUTURE Christoph Hellwig
2021-01-21 7:49 ` [PATCH 13/13] module: remove EXPORY_UNUSED_SYMBOL* Christoph Hellwig
2021-01-27 13:49 ` Jessica Yu [this message]
2021-01-28 16:09 ` Christoph Hellwig
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