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init/modpost: conditionally check section mismatch to __meminit*
This reverts commit eb8f689046 ("Use separate sections for __dev/
_cpu/__mem code/data").
Check section mismatch to __meminit* only when CONFIG_MEMORY_HOTPLUG=n.
With this change, the linker script and modpost become simpler, and we
can get rid of the __ref annotations from the memory hotplug code.
[sfr@canb.auug.org.au: remove MEM_KEEP from arch/powerpc/kernel/vmlinux.lds.S]
Link: https://lkml.kernel.org/r/20240710093213.2aefb25f@canb.auug.org.au
Link: https://lkml.kernel.org/r/20240706160511.2331061-2-masahiroy@kernel.org
Signed-off-by: Masahiro Yamada <masahiroy@kernel.org>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
Reviewed-by: Wei Yang <richard.weiyang@gmail.com>
Cc: Stephen Rothwell <sfr@canb.auug.org.au>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
This commit is contained in:
Masahiro Yamada
Andrew Morton
parent
7a7127aa33
commit
73db3abdca
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@ -123,8 +123,6 @@ SECTIONS
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*/
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*(.sfpr);
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*(.text.asan.* .text.tsan.*)
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MEM_KEEP(init.text)
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MEM_KEEP(exit.text)
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} :text
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. = ALIGN(PAGE_SIZE);
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@ -141,14 +141,6 @@
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* often happens at runtime)
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*/
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#if defined(CONFIG_MEMORY_HOTPLUG)
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#define MEM_KEEP(sec) *(.mem##sec)
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#define MEM_DISCARD(sec)
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#else
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#define MEM_KEEP(sec)
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#define MEM_DISCARD(sec) *(.mem##sec)
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#endif
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#ifndef CONFIG_HAVE_DYNAMIC_FTRACE_NO_PATCHABLE
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#define KEEP_PATCHABLE KEEP(*(__patchable_function_entries))
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#define PATCHABLE_DISCARDS
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@ -357,7 +349,6 @@
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*(.data..decrypted) \
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*(.ref.data) \
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*(.data..shared_aligned) /* percpu related */ \
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MEM_KEEP(init.data*) \
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*(.data.unlikely) \
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__start_once = .; \
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*(.data.once) \
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@ -542,7 +533,6 @@
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/* __*init sections */ \
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__init_rodata : AT(ADDR(__init_rodata) - LOAD_OFFSET) { \
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*(.ref.rodata) \
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MEM_KEEP(init.rodata) \
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} \
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\
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/* Built-in module parameters. */ \
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@ -593,8 +583,7 @@
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*(.text.unknown .text.unknown.*) \
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NOINSTR_TEXT \
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*(.ref.text) \
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*(.text.asan.* .text.tsan.*) \
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MEM_KEEP(init.text*) \
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*(.text.asan.* .text.tsan.*)
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/* sched.text is aling to function alignment to secure we have same
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@ -701,7 +690,6 @@
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#define INIT_DATA \
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KEEP(*(SORT(___kentry+*))) \
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*(.init.data .init.data.*) \
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MEM_DISCARD(init.data*) \
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KERNEL_CTORS() \
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MCOUNT_REC() \
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*(.init.rodata .init.rodata.*) \
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@ -709,7 +697,6 @@
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TRACE_SYSCALLS() \
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KPROBE_BLACKLIST() \
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ERROR_INJECT_WHITELIST() \
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MEM_DISCARD(init.rodata) \
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CLK_OF_TABLES() \
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RESERVEDMEM_OF_TABLES() \
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TIMER_OF_TABLES() \
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@ -727,8 +714,7 @@
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#define INIT_TEXT \
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*(.init.text .init.text.*) \
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*(.text.startup) \
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MEM_DISCARD(init.text*)
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*(.text.startup)
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#define EXIT_DATA \
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*(.exit.data .exit.data.*) \
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@ -84,11 +84,15 @@
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#define __exit __section(".exit.text") __exitused __cold notrace
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/* Used for MEMORY_HOTPLUG */
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#define __meminit __section(".meminit.text") __cold notrace \
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__latent_entropy
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#define __meminitdata __section(".meminit.data")
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#define __meminitconst __section(".meminit.rodata")
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#ifdef CONFIG_MEMORY_HOTPLUG
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#define __meminit
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#define __meminitdata
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#define __meminitconst
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#else
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#define __meminit __init
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#define __meminitdata __initdata
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#define __meminitconst __initconst
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#endif
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/* For assembly routines */
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#define __HEAD .section ".head.text","ax"
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@ -776,17 +776,14 @@ static void check_section(const char *modname, struct elf_info *elf,
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#define ALL_INIT_DATA_SECTIONS \
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".init.setup", ".init.rodata", ".meminit.rodata", \
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".init.data", ".meminit.data"
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".init.setup", ".init.rodata", ".init.data"
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#define ALL_PCI_INIT_SECTIONS \
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".pci_fixup_early", ".pci_fixup_header", ".pci_fixup_final", \
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".pci_fixup_enable", ".pci_fixup_resume", \
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".pci_fixup_resume_early", ".pci_fixup_suspend"
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#define ALL_XXXINIT_SECTIONS ".meminit.*"
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#define ALL_INIT_SECTIONS INIT_SECTIONS, ALL_XXXINIT_SECTIONS
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#define ALL_INIT_SECTIONS ".init.*"
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#define ALL_EXIT_SECTIONS ".exit.*"
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#define DATA_SECTIONS ".data", ".data.rel"
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@ -797,9 +794,7 @@ static void check_section(const char *modname, struct elf_info *elf,
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".fixup", ".entry.text", ".exception.text", \
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".coldtext", ".softirqentry.text"
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#define INIT_SECTIONS ".init.*"
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#define ALL_TEXT_SECTIONS ".init.text", ".meminit.text", ".exit.text", \
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#define ALL_TEXT_SECTIONS ".init.text", ".exit.text", \
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TEXT_SECTIONS, OTHER_TEXT_SECTIONS
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enum mismatch {
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@ -839,12 +834,6 @@ static const struct sectioncheck sectioncheck[] = {
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.bad_tosec = { ALL_INIT_SECTIONS, ALL_EXIT_SECTIONS, NULL },
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.mismatch = TEXTDATA_TO_ANY_INIT_EXIT,
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},
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/* Do not reference init code/data from meminit code/data */
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{
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.fromsec = { ALL_XXXINIT_SECTIONS, NULL },
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.bad_tosec = { INIT_SECTIONS, NULL },
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.mismatch = XXXINIT_TO_SOME_INIT,
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},
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/* Do not use exit code/data from init code */
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{
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.fromsec = { ALL_INIT_SECTIONS, NULL },
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@ -859,7 +848,7 @@ static const struct sectioncheck sectioncheck[] = {
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},
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{
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.fromsec = { ALL_PCI_INIT_SECTIONS, NULL },
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.bad_tosec = { INIT_SECTIONS, NULL },
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.bad_tosec = { ALL_INIT_SECTIONS, NULL },
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.mismatch = ANY_INIT_TO_ANY_EXIT,
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},
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{
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