On Thursday 14 February 2013, Stephen Warren wrote:

On 02/14/2013 03:47 PM, Arnd Bergmann wrote:

quoted

Patch c08e20d24 "arm: Add v7_invalidate_l1 to cache-v7.S"
moves the v7_invalidate_l1 symbol out of imx/headsmp.S,
which seems to cause a link error because it is now
too far away from v7_cpu_resume when building an
allyesconfig kernel.

Is the problem from the following in arch/arm/mach-imx/headsmp.S:

ENTRY(v7_cpu_resume)
        bl      v7_invalidate_l1

Isn't the range of bl +/- 32MiB (or +/- 16MibB in Thumb 2). Is the
kernel really that big? Sorry, I'm having trouble understanding what
causes the problem.

Well, it is an "allyesconfig" kernel, so things can get pretty big:

$ size  obj-tmp/vmlinux -A
obj-tmp/vmlinux  :
section                  size         addr
.head.text                504   3221258240
.text                32707336   3221258752
.text.head                  8   3253966088
.rodata              14028722   3253968896
__bug_table            127764   3267997624
.builtin_fw               684   3268125388
__ksymtab               53424   3268126072
__ksymtab_gpl           43560   3268179496
__kcrctab               26712   3268223056
__kcrctab_gpl           21780   3268249768
__ksymtab_strings      233706   3268271548
__param                 33104   3268505256
__modver                 4104   3268538360
__ex_table               4112   3268542464
.ARM.unwind_idx        967784   3268546576
.ARM.unwind_tab       1452168   3269514360
.notes                     36   3270966528
.init.text             677840   3270967296
.exit.text             125672   3271645136
.init.arch.info          5396   3271770808
.init.tagtable             72   3271776204
.init.smpalt              928   3271776276
.init.pv_table           1704   3271777204
.init.data             678108   3271778912
.exit.data                119   3272457020
.data..percpu         1460032   3272458240
.data                 3370068   3273924608
.tcm_start                940   3277294676
.bss                  8007724   3277295616
.comment                   43            0
.ARM.attributes            50            0
.debug_line          15780363            0
.debug_info          57192143            0
.debug_abbrev         5747374            0
.debug_aranges         299608            0
.debug_ranges         5414592            0
.debug_frame          4801748            0
.debug_str            7003282            0
.debug_loc           36237476            0
Total               196510790

THUMB2 support is obviously enabled (allyesconfig), and from the start of the
.head.text section to the end of .bss, it is 64,045,100 bytes, using yesterday's
linux-next kernel with my fixes. It will get bigger as we add more stuff
to multiplatform. The .text section alone is just short of 32MB.

	Arnd