From: Ben Hutchings <ben@decadent.org.uk>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: akpm@linux-foundation.org,
"Mathias Krause" <minipli@googlemail.com>,
"Rusty Russell" <rusty@rustcorp.com.au>
Subject: [PATCH 3.2 020/104] modpost: reduce visibility of symbols and constify r/o arrays
Date: Mon, 12 Mar 2018 03:03:34 +0000 [thread overview]
Message-ID: <lsq.1520823814.677872617@decadent.org.uk> (raw)
In-Reply-To: <lsq.1520823814.606620518@decadent.org.uk>
3.2.101-rc1 review patch. If anyone has any objections, please let me know.
------------------
From: Mathias Krause <minipli@googlemail.com>
commit 7a3ee7538598e0d60e6aa87dcf34a4e8a0adebc2 upstream.
Internally used symbols of modpost don't need to be externally visible;
make them static. Also constify the string arrays so they resist in the
r/o section instead of being runtime writable.
Those changes lead to a small size reduction as can be seen below:
text data bss dec hex filename
51381 2640 12416 66437 10385 scripts/mod/modpost.old
51765 2224 12416 66405 10365 scripts/mod/modpost.new
Signed-off-by: Mathias Krause <minipli@googlemail.com>
Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Ben Hutchings <ben@decadent.org.uk>
---
scripts/mod/modpost.c | 23 ++++++++++++-----------
1 file changed, 12 insertions(+), 11 deletions(-)
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -28,9 +28,9 @@
/* Are we using CONFIG_MODVERSIONS? */
-int modversions = 0;
+static int modversions = 0;
/* Warn about undefined symbols? (do so if we have vmlinux) */
-int have_vmlinux = 0;
+static int have_vmlinux = 0;
/* Is CONFIG_MODULE_SRCVERSION_ALL set? */
static int all_versions = 0;
/* If we are modposting external module set to 1 */
@@ -225,7 +225,7 @@ static struct symbol *find_symbol(const
return NULL;
}
-static struct {
+static const struct {
const char *str;
enum export export;
} export_list[] = {
@@ -816,7 +816,7 @@ static int match(const char *sym, const
}
/* sections that we do not want to do full section mismatch check on */
-static const char *section_white_list[] =
+static const char *const section_white_list[] =
{
".comment*",
".debug*",
@@ -888,17 +888,18 @@ static void check_section(const char *mo
#define MEM_EXIT_SECTIONS ".memexit.*"
/* init data sections */
-static const char *init_data_sections[] = { ALL_INIT_DATA_SECTIONS, NULL };
+static const char *const init_data_sections[] =
+ { ALL_INIT_DATA_SECTIONS, NULL };
/* all init sections */
-static const char *init_sections[] = { ALL_INIT_SECTIONS, NULL };
+static const char *const init_sections[] = { ALL_INIT_SECTIONS, NULL };
/* All init and exit sections (code + data) */
-static const char *init_exit_sections[] =
+static const char *const init_exit_sections[] =
{ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL };
/* data section */
-static const char *data_sections[] = { DATA_SECTIONS, NULL };
+static const char *const data_sections[] = { DATA_SECTIONS, NULL };
/* symbols in .data that may refer to init/exit sections */
@@ -912,8 +913,8 @@ static const char *data_sections[] = { D
"*_probe_one", \
"*_console"
-static const char *head_sections[] = { ".head.text*", NULL };
-static const char *linker_symbols[] =
+static const char *const head_sections[] = { ".head.text*", NULL };
+static const char *const linker_symbols[] =
{ "__init_begin", "_sinittext", "_einittext", NULL };
enum mismatch {
@@ -935,7 +936,7 @@ struct sectioncheck {
const char *symbol_white_list[20];
};
-const struct sectioncheck sectioncheck[] = {
+static const struct sectioncheck sectioncheck[] = {
/* Do not reference init/exit code/data from
* normal code and data
*/
next prev parent reply other threads:[~2018-03-12 3:24 UTC|newest]
Thread overview: 106+ messages / expand[flat|nested] mbox.gz Atom feed top
2018-03-12 3:03 [PATCH 3.2 000/104] 3.2.101-rc1 review Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 022/104] fs: namespace: suppress 'may be used uninitialized' warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 040/104] x86/cpufeatures: Make CPU bugs sticky Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 064/104] x86/retpoline/checksum32: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 060/104] x86/retpoline/entry: Convert entry " Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 028/104] x86/bitops: Move BIT_64() for a wider use Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 026/104] staging/wlan-ng: Fix 'Branch condition evaluates to a garbage value' in p80211netdev.c Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 063/104] x86/retpoline/xen: Convert Xen hypercall indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 031/104] KVM: SVM: Make use of asm.h Ben Hutchings
2018-03-12 3:03 ` Ben Hutchings [this message]
2018-03-12 3:03 ` [PATCH 3.2 099/104] nospec: Kill array_index_nospec_mask_check() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 061/104] x86/retpoline/ftrace: Convert ftrace assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 086/104] x86/get_user: Use pointer masking to limit speculation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 019/104] ath6kl: fix struct hif_scatter_req list handling Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 002/104] Bluetooth: Remove unused hci_le_ltk_reply() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 078/104] x86/nospec: Fix header guards names Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 055/104] x86/asm: Make asm/alternative.h safe from assembly Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 021/104] modpost: don't emit section mismatch warnings for compiler optimizations Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 045/104] x86/cpu: Merge bugs.c and bugs_64.c Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 011/104] Removed unused typedef to avoid "unused local typedef" warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 103/104] x86: fix build warnign with 32-bit PAE Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 006/104] Turn off -Wmaybe-uninitialized when building with -Os Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 039/104] x86/cpu: Factor out application of forced CPU caps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 027/104] kconfig: fix IS_ENABLED to not require all options to be defined Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 053/104] x86/cpu/AMD: Make LFENCE a serializing instruction Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 084/104] x86: Implement array_index_mask_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 004/104] brcm80211: Remove bogus memcpy in ai_detach Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 104/104] cris: Remove old legacy "-traditional" flag from arch-v10/lib/Makefile Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 057/104] x86/asm: Use register variable to get stack pointer value Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 058/104] x86/retpoline: Add initial retpoline support Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 059/104] x86/spectre: Add boot time option to select Spectre v2 mitigation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 013/104] usb: renesas_usbhs: tidyup original usbhsx_for_each_xxx macro Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 010/104] rtlwifi: initialize local array and set value Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 066/104] x86/retpoline: Fill return stack buffer on vmexit Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 093/104] x86/retpoline: Avoid retpolines for built-in __init functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 037/104] kvm: vmx: Scrub hardware GPRs at VM-exit Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 083/104] array_index_nospec: Sanitize speculative array de-references Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 067/104] x86/retpoline: Remove compile time warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 029/104] x86, alternative: Add header guards to <asm/alternative-asm.h> Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 023/104] [media] max2165: trival fix for some -Wuninitialized warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 096/104] x86/cpufeatures: Clean up Spectre v2 related CPUID flags Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 043/104] x86/pti: Rename BUG_CPU_INSECURE to BUG_CPU_MELTDOWN Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 046/104] sysfs/cpu: Add vulnerability folder Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 072/104] x86/pti: Document fix wrong index Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 025/104] atp: remove set_rx_mode_8012() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 047/104] x86/cpu: Implement CPU vulnerabilites sysfs functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 007/104] rtlwifi: rtl8192c: Fix W=1 warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 016/104] gcov: compile specific gcov implementation based on gcc version Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 041/104] x86/cpufeatures: Add X86_BUG_CPU_INSECURE Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 001/104] brcmfmac: work-around gcc 4.7 build issue Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 033/104] x86, asm: Extend definitions of _ASM_* with a raw format Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 044/104] x86/cpufeatures: Add X86_BUG_SPECTRE_V[12] Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 017/104] SELinux: security_load_policy: Silence frame-larger-than warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 073/104] x86/retpoline: Optimize inline assembler for vmexit_fill_RSB Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 036/104] x86/alternatives: Add missing '\n' at end of ALTERNATIVE inline asm Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 091/104] x86/paravirt: Remove 'noreplace-paravirt' cmdline option Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 070/104] kprobes/x86: Blacklist indirect thunk functions for kprobes Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 089/104] x86/spectre: Report get_user mitigation for spectre_v1 Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 079/104] x86/bugs: Drop one "mitigation" from dmesg Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 008/104] rtlwifi: rtl8192de: Fix W=1 build warnings Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 056/104] kconfig.h: use __is_defined() to check if MODULE is defined Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 085/104] x86: Introduce barrier_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 042/104] x86/cpu, x86/pti: Do not enable PTI on AMD processors Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 052/104] x86/alternatives: Fix optimize_nops() checking Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 068/104] x86/retpoline: Add LFENCE to the retpoline/RSB filling RSB macros Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 101/104] x86: Introduce __uaccess_begin_nospec() and uaccess_try_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 003/104] rtlwifi: rtl8192se: Fix gcc 4.7.x warning Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 088/104] vfs, fdtable: Prevent bounds-check bypass via speculative execution Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 080/104] x86/cpu/bugs: Make retpoline module warning conditional Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 065/104] x86/retpoline/irq32: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 012/104] usb: renesas_usbhs: fixup __usbhs_for_each_pipe 1st pos Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 071/104] kprobes/x86: Disable optimizing on the function jumps to indirect thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 094/104] x86/spectre: Simplify spectre_v2 command line parsing Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 030/104] KVM: VMX: Make use of asm.h Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 076/104] x86/retpoline: Remove the esp/rsp thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 005/104] ath6kl: fix uninitialized variable in ath6kl_sdio_enable_scatter() Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 075/104] x86/retpoline: Fill RSB on context switch for affected CPUs Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 092/104] x86/kvm: Update spectre-v1 mitigation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 009/104] rtl8192c:dm: Properly initialize local array and set value Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 054/104] x86/cpu/AMD: Use LFENCE_RDTSC in preference to MFENCE_RDTSC Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 018/104] gcov: add support for GCC 4.9 Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 102/104] x86/uaccess: Use __uaccess_begin_nospec() and uaccess_try_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 048/104] sysfs/cpu: Fix typos in vulnerability documentation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 087/104] x86/syscall: Sanitize syscall table de-references under speculation Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 098/104] nospec: Move array_index_nospec() parameter checking into separate macro Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 014/104] gcov: move gcov structs definitions to a gcc version specific file Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 032/104] x86, cpu: Expand cpufeature facility to include cpu bugs Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 051/104] x86/alternatives: Make optimize_nops() interrupt safe and synced Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 024/104] [media] budget-av: only use t_state if initialized Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 015/104] gcov: add support for gcc 4.7 gcov format Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 100/104] nospec: Include <asm/barrier.h> dependency Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 035/104] x86: Add another set of MSR accessor functions Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 082/104] Documentation: Document array_index_nospec Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 050/104] x86/alternatives: Fix ALTERNATIVE_2 padding generation properly Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 069/104] retpoline: Introduce start/end markers of indirect thunk Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 077/104] module/retpoline: Warn about missing retpoline in module Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 090/104] x86/spectre: Fix spelling mistake: "vunerable"-> "vulnerable" Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 074/104] x86/cpu/intel: Introduce macros for Intel family numbers Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 097/104] x86/spectre: Fix an error message Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 062/104] x86/retpoline/hyperv: Convert assembler indirect jumps Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 038/104] x86/Documentation: Add PTI description Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 095/104] x86/speculation: Fix typo IBRS_ATT, which should be IBRS_ALL Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 049/104] x86/alternatives: Guard NOPs optimization Ben Hutchings
2018-03-12 3:03 ` [PATCH 3.2 034/104] bitops: Introduce BIT_ULL Ben Hutchings
2018-03-12 14:54 ` [PATCH 3.2 000/104] 3.2.101-rc1 review Guenter Roeck
2018-03-12 19:53 ` Ben Hutchings
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