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x86 spinlock trylock: make next initializer old-gcc friendly

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old gcc versions are stupid with nested structs and need us
to initialize .tickets.head and .tickets.tail in one go

Change-Id: I0d4caf8236066e7edf4a12e3270114132ced9585
This commit is contained in:
Dominique Martinet
2019-03-04 13:51:09 +09:00
committed by Dominique Martinet
parent 19b02cf4ed
commit 940eeca6f5
1 changed files with 4 additions and 1 deletions
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5
arch/x86_64/kernel/include/arch-lock.h
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@ -53,7 +53,10 @@ rc = __ihk_mc_spinlock_trylock_noirq(l); \
static inline int __ihk_mc_spinlock_trylock_noirq(ihk_spinlock_t *lock)
{
ihk_spinlock_t cur = { .head_tail = lock->head_tail };
ihk_spinlock_t next = { .tickets.head = cur.tickets.head, .tickets.tail = cur.tickets.tail + 2 };
ihk_spinlock_t next = { .tickets = {
.head = cur.tickets.head,
.tail = cur.tickets.tail + 2
} };
int success;
if (cur.tickets.head != cur.tickets.tail) {