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1beafaaa30f59acf61cbbc1c81457954319acafb
[openwrt/openwrt.git] / target / linux / generic / patches-3.14 / 220-gc_sections.patch
1 From: Felix Fietkau <nbd@openwrt.org>
2
3 use -ffunction-sections, -fdata-sections and --gc-sections --sort-section=name
4
5 In combination with kernel symbol export stripping this significantly reduces
6 the kernel image size. Used on both ARM and MIPS architectures.
7
8 Signed-off-by: Felix Fietkau <nbd@openwrt.org>
9 Signed-off-by: Jonas Gorski <jogo@openwrt.org>
10 Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
11 ---
12
13 --- a/arch/mips/Makefile
14 +++ b/arch/mips/Makefile
15 @@ -89,10 +89,14 @@ all-$(CONFIG_SYS_SUPPORTS_ZBOOT)+= vmlin
16 #
17 cflags-y += -G 0 -mno-abicalls -fno-pic -pipe
18 cflags-y += -msoft-float
19 -LDFLAGS_vmlinux += -G 0 -static -n -nostdlib
20 +LDFLAGS_vmlinux += -G 0 -static -n -nostdlib --gc-sections --sort-section=name
21 KBUILD_AFLAGS_MODULE += -mlong-calls
22 KBUILD_CFLAGS_MODULE += -mlong-calls
23
24 +ifndef CONFIG_FUNCTION_TRACER
25 +KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
26 +endif
27 +
28 cflags-y += -ffreestanding
29
30 #
31 --- a/arch/mips/kernel/vmlinux.lds.S
32 +++ b/arch/mips/kernel/vmlinux.lds.S
33 @@ -67,7 +67,7 @@ SECTIONS
34 /* Exception table for data bus errors */
35 __dbe_table : {
36 __start___dbe_table = .;
37 - *(__dbe_table)
38 + KEEP(*(__dbe_table))
39 __stop___dbe_table = .;
40 }
41
42 @@ -112,7 +112,7 @@ SECTIONS
43 . = ALIGN(4);
44 .mips.machines.init : AT(ADDR(.mips.machines.init) - LOAD_OFFSET) {
45 __mips_machines_start = .;
46 - *(.mips.machines.init)
47 + KEEP(*(.mips.machines.init))
48 __mips_machines_end = .;
49 }
50
51 --- a/include/asm-generic/vmlinux.lds.h
52 +++ b/include/asm-generic/vmlinux.lds.h
53 @@ -87,7 +87,7 @@
54 #ifdef CONFIG_FTRACE_MCOUNT_RECORD
55 #define MCOUNT_REC() . = ALIGN(8); \
56 VMLINUX_SYMBOL(__start_mcount_loc) = .; \
57 - *(__mcount_loc) \
58 + KEEP(*(__mcount_loc)) \
59 VMLINUX_SYMBOL(__stop_mcount_loc) = .;
60 #else
61 #define MCOUNT_REC()
62 @@ -95,7 +95,7 @@
63
64 #ifdef CONFIG_TRACE_BRANCH_PROFILING
65 #define LIKELY_PROFILE() VMLINUX_SYMBOL(__start_annotated_branch_profile) = .; \
66 - *(_ftrace_annotated_branch) \
67 + KEEP(*(_ftrace_annotated_branch)) \
68 VMLINUX_SYMBOL(__stop_annotated_branch_profile) = .;
69 #else
70 #define LIKELY_PROFILE()
71 @@ -103,7 +103,7 @@
72
73 #ifdef CONFIG_PROFILE_ALL_BRANCHES
74 #define BRANCH_PROFILE() VMLINUX_SYMBOL(__start_branch_profile) = .; \
75 - *(_ftrace_branch) \
76 + KEEP(*(_ftrace_branch)) \
77 VMLINUX_SYMBOL(__stop_branch_profile) = .;
78 #else
79 #define BRANCH_PROFILE()
80 @@ -112,7 +112,7 @@
81 #ifdef CONFIG_EVENT_TRACING
82 #define FTRACE_EVENTS() . = ALIGN(8); \
83 VMLINUX_SYMBOL(__start_ftrace_events) = .; \
84 - *(_ftrace_events) \
85 + KEEP(*(_ftrace_events)) \
86 VMLINUX_SYMBOL(__stop_ftrace_events) = .;
87 #else
88 #define FTRACE_EVENTS()
89 @@ -120,7 +120,7 @@
90
91 #ifdef CONFIG_TRACING
92 #define TRACE_PRINTKS() VMLINUX_SYMBOL(__start___trace_bprintk_fmt) = .; \
93 - *(__trace_printk_fmt) /* Trace_printk fmt' pointer */ \
94 + KEEP(*(__trace_printk_fmt)) /* Trace_printk fmt' pointer */ \
95 VMLINUX_SYMBOL(__stop___trace_bprintk_fmt) = .;
96 #define TRACEPOINT_STR() VMLINUX_SYMBOL(__start___tracepoint_str) = .; \
97 *(__tracepoint_str) /* Trace_printk fmt' pointer */ \
98 @@ -133,7 +133,7 @@
99 #ifdef CONFIG_FTRACE_SYSCALLS
100 #define TRACE_SYSCALLS() . = ALIGN(8); \
101 VMLINUX_SYMBOL(__start_syscalls_metadata) = .; \
102 - *(__syscalls_metadata) \
103 + KEEP(*(__syscalls_metadata)) \
104 VMLINUX_SYMBOL(__stop_syscalls_metadata) = .;
105 #else
106 #define TRACE_SYSCALLS()
107 @@ -142,8 +142,8 @@
108 #ifdef CONFIG_CLKSRC_OF
109 #define CLKSRC_OF_TABLES() . = ALIGN(8); \
110 VMLINUX_SYMBOL(__clksrc_of_table) = .; \
111 - *(__clksrc_of_table) \
112 - *(__clksrc_of_table_end)
113 + KEEP(*(__clksrc_of_table)) \
114 + KEEP(*(__clksrc_of_table_end))
115 #else
116 #define CLKSRC_OF_TABLES()
117 #endif
118 @@ -152,8 +152,8 @@
119 #define IRQCHIP_OF_MATCH_TABLE() \
120 . = ALIGN(8); \
121 VMLINUX_SYMBOL(__irqchip_begin) = .; \
122 - *(__irqchip_of_table) \
123 - *(__irqchip_of_end)
124 + KEEP(*(__irqchip_of_table)) \
125 + KEEP(*(__irqchip_of_end))
126 #else
127 #define IRQCHIP_OF_MATCH_TABLE()
128 #endif
129 @@ -161,8 +161,8 @@
130 #ifdef CONFIG_COMMON_CLK
131 #define CLK_OF_TABLES() . = ALIGN(8); \
132 VMLINUX_SYMBOL(__clk_of_table) = .; \
133 - *(__clk_of_table) \
134 - *(__clk_of_table_end)
135 + KEEP(*(__clk_of_table)) \
136 + KEEP(*(__clk_of_table_end))
137 #else
138 #define CLK_OF_TABLES()
139 #endif
140 @@ -170,7 +170,7 @@
141 #define KERNEL_DTB() \
142 STRUCT_ALIGN(); \
143 VMLINUX_SYMBOL(__dtb_start) = .; \
144 - *(.dtb.init.rodata) \
145 + KEEP(*(.dtb.init.rodata)) \
146 VMLINUX_SYMBOL(__dtb_end) = .;
147
148 /* .data section */
149 @@ -186,16 +186,17 @@
150 /* implement dynamic printk debug */ \
151 . = ALIGN(8); \
152 VMLINUX_SYMBOL(__start___jump_table) = .; \
153 - *(__jump_table) \
154 + KEEP(*(__jump_table)) \
155 VMLINUX_SYMBOL(__stop___jump_table) = .; \
156 . = ALIGN(8); \
157 VMLINUX_SYMBOL(__start___verbose) = .; \
158 - *(__verbose) \
159 + KEEP(*(__verbose)) \
160 VMLINUX_SYMBOL(__stop___verbose) = .; \
161 LIKELY_PROFILE() \
162 BRANCH_PROFILE() \
163 TRACE_PRINTKS() \
164 - TRACEPOINT_STR()
165 + TRACEPOINT_STR() \
166 + *(.data.[a-zA-Z_]*)
167
168 /*
169 * Data section helpers
170 @@ -249,32 +250,32 @@
171 /* PCI quirks */ \
172 .pci_fixup : AT(ADDR(.pci_fixup) - LOAD_OFFSET) { \
173 VMLINUX_SYMBOL(__start_pci_fixups_early) = .; \
174 - *(.pci_fixup_early) \
175 + KEEP(*(.pci_fixup_early)) \
176 VMLINUX_SYMBOL(__end_pci_fixups_early) = .; \
177 VMLINUX_SYMBOL(__start_pci_fixups_header) = .; \
178 - *(.pci_fixup_header) \
179 + KEEP(*(.pci_fixup_header)) \
180 VMLINUX_SYMBOL(__end_pci_fixups_header) = .; \
181 VMLINUX_SYMBOL(__start_pci_fixups_final) = .; \
182 - *(.pci_fixup_final) \
183 + KEEP(*(.pci_fixup_final)) \
184 VMLINUX_SYMBOL(__end_pci_fixups_final) = .; \
185 VMLINUX_SYMBOL(__start_pci_fixups_enable) = .; \
186 - *(.pci_fixup_enable) \
187 + KEEP(*(.pci_fixup_enable)) \
188 VMLINUX_SYMBOL(__end_pci_fixups_enable) = .; \
189 VMLINUX_SYMBOL(__start_pci_fixups_resume) = .; \
190 - *(.pci_fixup_resume) \
191 + KEEP(*(.pci_fixup_resume)) \
192 VMLINUX_SYMBOL(__end_pci_fixups_resume) = .; \
193 VMLINUX_SYMBOL(__start_pci_fixups_resume_early) = .; \
194 - *(.pci_fixup_resume_early) \
195 + KEEP(*(.pci_fixup_resume_early)) \
196 VMLINUX_SYMBOL(__end_pci_fixups_resume_early) = .; \
197 VMLINUX_SYMBOL(__start_pci_fixups_suspend) = .; \
198 - *(.pci_fixup_suspend) \
199 + KEEP(*(.pci_fixup_suspend)) \
200 VMLINUX_SYMBOL(__end_pci_fixups_suspend) = .; \
201 } \
202 \
203 /* Built-in firmware blobs */ \
204 .builtin_fw : AT(ADDR(.builtin_fw) - LOAD_OFFSET) { \
205 VMLINUX_SYMBOL(__start_builtin_fw) = .; \
206 - *(.builtin_fw) \
207 + KEEP(*(.builtin_fw)) \
208 VMLINUX_SYMBOL(__end_builtin_fw) = .; \
209 } \
210 \
211 @@ -283,49 +284,49 @@
212 /* Kernel symbol table: Normal symbols */ \
213 __ksymtab : AT(ADDR(__ksymtab) - LOAD_OFFSET) { \
214 VMLINUX_SYMBOL(__start___ksymtab) = .; \
215 - *(SORT(___ksymtab+*)) \
216 + KEEP(*(SORT(___ksymtab+*))) \
217 VMLINUX_SYMBOL(__stop___ksymtab) = .; \
218 } \
219 \
220 /* Kernel symbol table: GPL-only symbols */ \
221 __ksymtab_gpl : AT(ADDR(__ksymtab_gpl) - LOAD_OFFSET) { \
222 VMLINUX_SYMBOL(__start___ksymtab_gpl) = .; \
223 - *(SORT(___ksymtab_gpl+*)) \
224 + KEEP(*(SORT(___ksymtab_gpl+*))) \
225 VMLINUX_SYMBOL(__stop___ksymtab_gpl) = .; \
226 } \
227 \
228 /* Kernel symbol table: Normal unused symbols */ \
229 __ksymtab_unused : AT(ADDR(__ksymtab_unused) - LOAD_OFFSET) { \
230 VMLINUX_SYMBOL(__start___ksymtab_unused) = .; \
231 - *(SORT(___ksymtab_unused+*)) \
232 + KEEP(*(SORT(___ksymtab_unused+*))) \
233 VMLINUX_SYMBOL(__stop___ksymtab_unused) = .; \
234 } \
235 \
236 /* Kernel symbol table: GPL-only unused symbols */ \
237 __ksymtab_unused_gpl : AT(ADDR(__ksymtab_unused_gpl) - LOAD_OFFSET) { \
238 VMLINUX_SYMBOL(__start___ksymtab_unused_gpl) = .; \
239 - *(SORT(___ksymtab_unused_gpl+*)) \
240 + KEEP(*(SORT(___ksymtab_unused_gpl+*))) \
241 VMLINUX_SYMBOL(__stop___ksymtab_unused_gpl) = .; \
242 } \
243 \
244 /* Kernel symbol table: GPL-future-only symbols */ \
245 __ksymtab_gpl_future : AT(ADDR(__ksymtab_gpl_future) - LOAD_OFFSET) { \
246 VMLINUX_SYMBOL(__start___ksymtab_gpl_future) = .; \
247 - *(SORT(___ksymtab_gpl_future+*)) \
248 + KEEP(*(SORT(___ksymtab_gpl_future+*))) \
249 VMLINUX_SYMBOL(__stop___ksymtab_gpl_future) = .; \
250 } \
251 \
252 /* Kernel symbol table: Normal symbols */ \
253 __kcrctab : AT(ADDR(__kcrctab) - LOAD_OFFSET) { \
254 VMLINUX_SYMBOL(__start___kcrctab) = .; \
255 - *(SORT(___kcrctab+*)) \
256 + KEEP(*(SORT(___kcrctab+*))) \
257 VMLINUX_SYMBOL(__stop___kcrctab) = .; \
258 } \
259 \
260 /* Kernel symbol table: GPL-only symbols */ \
261 __kcrctab_gpl : AT(ADDR(__kcrctab_gpl) - LOAD_OFFSET) { \
262 VMLINUX_SYMBOL(__start___kcrctab_gpl) = .; \
263 - *(SORT(___kcrctab_gpl+*)) \
264 + KEEP(*(SORT(___kcrctab_gpl+*))) \
265 VMLINUX_SYMBOL(__stop___kcrctab_gpl) = .; \
266 } \
267 \
268 @@ -339,14 +340,14 @@
269 /* Kernel symbol table: GPL-only unused symbols */ \
270 __kcrctab_unused_gpl : AT(ADDR(__kcrctab_unused_gpl) - LOAD_OFFSET) { \
271 VMLINUX_SYMBOL(__start___kcrctab_unused_gpl) = .; \
272 - *(SORT(___kcrctab_unused_gpl+*)) \
273 + KEEP(*(SORT(___kcrctab_unused_gpl+*))) \
274 VMLINUX_SYMBOL(__stop___kcrctab_unused_gpl) = .; \
275 } \
276 \
277 /* Kernel symbol table: GPL-future-only symbols */ \
278 __kcrctab_gpl_future : AT(ADDR(__kcrctab_gpl_future) - LOAD_OFFSET) { \
279 VMLINUX_SYMBOL(__start___kcrctab_gpl_future) = .; \
280 - *(SORT(___kcrctab_gpl_future+*)) \
281 + KEEP(*(SORT(___kcrctab_gpl_future+*))) \
282 VMLINUX_SYMBOL(__stop___kcrctab_gpl_future) = .; \
283 } \
284 \
285 @@ -365,14 +366,14 @@
286 /* Built-in module parameters. */ \
287 __param : AT(ADDR(__param) - LOAD_OFFSET) { \
288 VMLINUX_SYMBOL(__start___param) = .; \
289 - *(__param) \
290 + KEEP(*(__param)) \
291 VMLINUX_SYMBOL(__stop___param) = .; \
292 } \
293 \
294 /* Built-in module versions. */ \
295 __modver : AT(ADDR(__modver) - LOAD_OFFSET) { \
296 VMLINUX_SYMBOL(__start___modver) = .; \
297 - *(__modver) \
298 + KEEP(*(__modver)) \
299 VMLINUX_SYMBOL(__stop___modver) = .; \
300 . = ALIGN((align)); \
301 VMLINUX_SYMBOL(__end_rodata) = .; \
302 @@ -428,7 +429,7 @@
303 #define ENTRY_TEXT \
304 ALIGN_FUNCTION(); \
305 VMLINUX_SYMBOL(__entry_text_start) = .; \
306 - *(.entry.text) \
307 + KEEP(*(.entry.text)) \
308 VMLINUX_SYMBOL(__entry_text_end) = .;
309
310 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
311 @@ -456,7 +457,7 @@
312 . = ALIGN(align); \
313 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) { \
314 VMLINUX_SYMBOL(__start___ex_table) = .; \
315 - *(__ex_table) \
316 + KEEP(*(__ex_table)) \
317 VMLINUX_SYMBOL(__stop___ex_table) = .; \
318 }
319
320 @@ -472,8 +473,8 @@
321 #ifdef CONFIG_CONSTRUCTORS
322 #define KERNEL_CTORS() . = ALIGN(8); \
323 VMLINUX_SYMBOL(__ctors_start) = .; \
324 - *(.ctors) \
325 - *(.init_array) \
326 + KEEP(*(.ctors)) \
327 + KEEP(*(.init_array)) \
328 VMLINUX_SYMBOL(__ctors_end) = .;
329 #else
330 #define KERNEL_CTORS()
331 @@ -517,7 +518,7 @@
332 #define SBSS(sbss_align) \
333 . = ALIGN(sbss_align); \
334 .sbss : AT(ADDR(.sbss) - LOAD_OFFSET) { \
335 - *(.sbss) \
336 + *(.sbss .sbss.*) \
337 *(.scommon) \
338 }
339
340 @@ -535,7 +536,7 @@
341 BSS_FIRST_SECTIONS \
342 *(.bss..page_aligned) \
343 *(.dynbss) \
344 - *(.bss) \
345 + *(.bss .bss.*) \
346 *(COMMON) \
347 }
348
349 @@ -584,7 +585,7 @@
350 . = ALIGN(8); \
351 __bug_table : AT(ADDR(__bug_table) - LOAD_OFFSET) { \
352 VMLINUX_SYMBOL(__start___bug_table) = .; \
353 - *(__bug_table) \
354 + KEEP(*(__bug_table)) \
355 VMLINUX_SYMBOL(__stop___bug_table) = .; \
356 }
357 #else
358 @@ -596,7 +597,7 @@
359 . = ALIGN(4); \
360 .tracedata : AT(ADDR(.tracedata) - LOAD_OFFSET) { \
361 VMLINUX_SYMBOL(__tracedata_start) = .; \
362 - *(.tracedata) \
363 + KEEP(*(.tracedata)) \
364 VMLINUX_SYMBOL(__tracedata_end) = .; \
365 }
366 #else
367 @@ -613,17 +614,17 @@
368 #define INIT_SETUP(initsetup_align) \
369 . = ALIGN(initsetup_align); \
370 VMLINUX_SYMBOL(__setup_start) = .; \
371 - *(.init.setup) \
372 + KEEP(*(.init.setup)) \
373 VMLINUX_SYMBOL(__setup_end) = .;
374
375 #define INIT_CALLS_LEVEL(level) \
376 VMLINUX_SYMBOL(__initcall##level##_start) = .; \
377 - *(.initcall##level##.init) \
378 - *(.initcall##level##s.init) \
379 + KEEP(*(.initcall##level##.init)) \
380 + KEEP(*(.initcall##level##s.init)) \
381
382 #define INIT_CALLS \
383 VMLINUX_SYMBOL(__initcall_start) = .; \
384 - *(.initcallearly.init) \
385 + KEEP(*(.initcallearly.init)) \
386 INIT_CALLS_LEVEL(0) \
387 INIT_CALLS_LEVEL(1) \
388 INIT_CALLS_LEVEL(2) \
389 @@ -637,21 +638,21 @@
390
391 #define CON_INITCALL \
392 VMLINUX_SYMBOL(__con_initcall_start) = .; \
393 - *(.con_initcall.init) \
394 + KEEP(*(.con_initcall.init)) \
395 VMLINUX_SYMBOL(__con_initcall_end) = .;
396
397 #define SECURITY_INITCALL \
398 VMLINUX_SYMBOL(__security_initcall_start) = .; \
399 - *(.security_initcall.init) \
400 + KEEP(*(.security_initcall.init)) \
401 VMLINUX_SYMBOL(__security_initcall_end) = .;
402
403 #ifdef CONFIG_BLK_DEV_INITRD
404 #define INIT_RAM_FS \
405 . = ALIGN(4); \
406 VMLINUX_SYMBOL(__initramfs_start) = .; \
407 - *(.init.ramfs) \
408 + KEEP(*(.init.ramfs)) \
409 . = ALIGN(8); \
410 - *(.init.ramfs.info)
411 + KEEP(*(.init.ramfs.info))
412 #else
413 #define INIT_RAM_FS
414 #endif
415 --- a/arch/arm/Makefile
416 +++ b/arch/arm/Makefile
417 @@ -18,11 +18,16 @@ ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
418 LDFLAGS_vmlinux += --be8
419 LDFLAGS_MODULE += --be8
420 endif
421 +LDFLAGS_vmlinux += --gc-sections --sort-section=name
422
423 OBJCOPYFLAGS :=-O binary -R .comment -S
424 GZFLAGS :=-9
425 #KBUILD_CFLAGS +=-pipe
426
427 +ifndef CONFIG_FUNCTION_TRACER
428 +KBUILD_CFLAGS_KERNEL += -ffunction-sections -fdata-sections
429 +endif
430 +
431 # Never generate .eh_frame
432 KBUILD_CFLAGS += $(call cc-option,-fno-dwarf2-cfi-asm)
433
434 --- a/arch/arm/kernel/vmlinux.lds.S
435 +++ b/arch/arm/kernel/vmlinux.lds.S
436 @@ -12,13 +12,13 @@
437 #define PROC_INFO \
438 . = ALIGN(4); \
439 VMLINUX_SYMBOL(__proc_info_begin) = .; \
440 - *(.proc.info.init) \
441 + KEEP(*(.proc.info.init)) \
442 VMLINUX_SYMBOL(__proc_info_end) = .;
443
444 #define IDMAP_TEXT \
445 ALIGN_FUNCTION(); \
446 VMLINUX_SYMBOL(__idmap_text_start) = .; \
447 - *(.idmap.text) \
448 + KEEP(*(.idmap.text)) \
449 VMLINUX_SYMBOL(__idmap_text_end) = .; \
450 . = ALIGN(32); \
451 VMLINUX_SYMBOL(__hyp_idmap_text_start) = .; \
452 @@ -93,7 +93,7 @@ SECTIONS
453 .text : { /* Real text segment */
454 _stext = .; /* Text and read-only data */
455 __exception_text_start = .;
456 - *(.exception.text)
457 + KEEP(*(.exception.text))
458 __exception_text_end = .;
459 IRQENTRY_TEXT
460 TEXT_TEXT
461 @@ -118,7 +118,7 @@ SECTIONS
462 __ex_table : AT(ADDR(__ex_table) - LOAD_OFFSET) {
463 __start___ex_table = .;
464 #ifdef CONFIG_MMU
465 - *(__ex_table)
466 + KEEP(*(__ex_table))
467 #endif
468 __stop___ex_table = .;
469 }
470 @@ -130,12 +130,12 @@ SECTIONS
471 . = ALIGN(8);
472 .ARM.unwind_idx : {
473 __start_unwind_idx = .;
474 - *(.ARM.exidx*)
475 + KEEP(*(.ARM.exidx*))
476 __stop_unwind_idx = .;
477 }
478 .ARM.unwind_tab : {
479 __start_unwind_tab = .;
480 - *(.ARM.extab*)
481 + KEEP(*(.ARM.extab*))
482 __stop_unwind_tab = .;
483 }
484 #endif
485 @@ -154,14 +154,14 @@ SECTIONS
486 */
487 __vectors_start = .;
488 .vectors 0 : AT(__vectors_start) {
489 - *(.vectors)
490 + KEEP(*(.vectors))
491 }
492 . = __vectors_start + SIZEOF(.vectors);
493 __vectors_end = .;
494
495 __stubs_start = .;
496 .stubs 0x1000 : AT(__stubs_start) {
497 - *(.stubs)
498 + KEEP(*(.stubs))
499 }
500 . = __stubs_start + SIZEOF(.stubs);
501 __stubs_end = .;
502 @@ -175,24 +175,24 @@ SECTIONS
503 }
504 .init.arch.info : {
505 __arch_info_begin = .;
506 - *(.arch.info.init)
507 + KEEP(*(.arch.info.init))
508 __arch_info_end = .;
509 }
510 .init.tagtable : {
511 __tagtable_begin = .;
512 - *(.taglist.init)
513 + KEEP(*(.taglist.init))
514 __tagtable_end = .;
515 }
516 #ifdef CONFIG_SMP_ON_UP
517 .init.smpalt : {
518 __smpalt_begin = .;
519 - *(.alt.smp.init)
520 + KEEP(*(.alt.smp.init))
521 __smpalt_end = .;
522 }
523 #endif
524 .init.pv_table : {
525 __pv_table_begin = .;
526 - *(.pv_table)
527 + KEEP(*(.pv_table))
528 __pv_table_end = .;
529 }
530 .init.data : {
531 --- a/arch/arm/boot/compressed/Makefile
532 +++ b/arch/arm/boot/compressed/Makefile
533 @@ -120,6 +120,7 @@ ifeq ($(CONFIG_FUNCTION_TRACER),y)
534 ORIG_CFLAGS := $(KBUILD_CFLAGS)
535 KBUILD_CFLAGS = $(subst -pg, , $(ORIG_CFLAGS))
536 endif
537 +KBUILD_CFLAGS_KERNEL := $(patsubst -f%-sections,,$(KBUILD_CFLAGS_KERNEL))
538
539 ccflags-y := -fpic -mno-single-pic-base -fno-builtin -I$(obj)
540 asflags-y := -DZIMAGE
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