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Subject[tip:WIP.sched/core 19/22] arch/m68k/include/asm/switch_to.h:30:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'void'
tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head: ffce6fffa0033fa54d1bac1c7494862b71316978
commit: ecaf52c9ec5ad31395e5c06c01e293ebcf0e4350 [19/22] sched/headers: Simplify and clean up header usage in the scheduler
config: m68k-sun3_defconfig (attached as .config)
compiler: m68k-linux-gnu-gcc (Debian 7.2.0-11) 7.2.0
reproduce:
wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
chmod +x ~/bin/make.cross
git checkout ecaf52c9ec5ad31395e5c06c01e293ebcf0e4350
# save the attached .config to linux build tree
make.cross ARCH=m68k

All errors (new ones prefixed by >>):

In file included from kernel/sched/core.c:8:0:
>> arch/m68k/include/asm/switch_to.h:30:12: error: expected '=', ',', ';', 'asm' or '__attribute__' before 'void'
asmlinkage void resume(void);
^~~~

vim +30 arch/m68k/include/asm/switch_to.h

803f69144 David Howells 2012-03-28 4
803f69144 David Howells 2012-03-28 5 /*
803f69144 David Howells 2012-03-28 6 * switch_to(n) should switch tasks to task ptr, first checking that
803f69144 David Howells 2012-03-28 7 * ptr isn't the current task, in which case it does nothing. This
803f69144 David Howells 2012-03-28 8 * also clears the TS-flag if the task we switched to has used the
803f69144 David Howells 2012-03-28 9 * math co-processor latest.
803f69144 David Howells 2012-03-28 10 */
803f69144 David Howells 2012-03-28 11 /*
803f69144 David Howells 2012-03-28 12 * switch_to() saves the extra registers, that are not saved
803f69144 David Howells 2012-03-28 13 * automatically by SAVE_SWITCH_STACK in resume(), ie. d0-d5 and
803f69144 David Howells 2012-03-28 14 * a0-a1. Some of these are used by schedule() and its predecessors
803f69144 David Howells 2012-03-28 15 * and so we might get see unexpected behaviors when a task returns
803f69144 David Howells 2012-03-28 16 * with unexpected register values.
803f69144 David Howells 2012-03-28 17 *
803f69144 David Howells 2012-03-28 18 * syscall stores these registers itself and none of them are used
803f69144 David Howells 2012-03-28 19 * by syscall after the function in the syscall has been called.
803f69144 David Howells 2012-03-28 20 *
803f69144 David Howells 2012-03-28 21 * Beware that resume now expects *next to be in d1 and the offset of
803f69144 David Howells 2012-03-28 22 * tss to be in a1. This saves a few instructions as we no longer have
803f69144 David Howells 2012-03-28 23 * to push them onto the stack and read them back right after.
803f69144 David Howells 2012-03-28 24 *
803f69144 David Howells 2012-03-28 25 * 02/17/96 - Jes Sorensen (jds@kom.auc.dk)
803f69144 David Howells 2012-03-28 26 *
803f69144 David Howells 2012-03-28 27 * Changed 96/09/19 by Andreas Schwab
803f69144 David Howells 2012-03-28 28 * pass prev in a0, next in a1
803f69144 David Howells 2012-03-28 29 */
803f69144 David Howells 2012-03-28 @30 asmlinkage void resume(void);
803f69144 David Howells 2012-03-28 31 #define switch_to(prev,next,last) do { \
803f69144 David Howells 2012-03-28 32 register void *_prev __asm__ ("a0") = (prev); \
803f69144 David Howells 2012-03-28 33 register void *_next __asm__ ("a1") = (next); \
803f69144 David Howells 2012-03-28 34 register void *_last __asm__ ("d1"); \
803f69144 David Howells 2012-03-28 35 __asm__ __volatile__("jbsr resume" \
803f69144 David Howells 2012-03-28 36 : "=a" (_prev), "=a" (_next), "=d" (_last) \
803f69144 David Howells 2012-03-28 37 : "0" (_prev), "1" (_next) \
803f69144 David Howells 2012-03-28 38 : "d0", "d2", "d3", "d4", "d5"); \
803f69144 David Howells 2012-03-28 39 (last) = _last; \
803f69144 David Howells 2012-03-28 40 } while (0)
803f69144 David Howells 2012-03-28 41

:::::: The code at line 30 was first introduced by commit
:::::: 803f69144f0d48863c68f9d111b56849c7cef5bb Disintegrate asm/system.h for M68K

:::::: TO: David Howells <dhowells@redhat.com>
:::::: CC: David Howells <dhowells@redhat.com>

---
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