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linuxkm/{module_hooks.c,linuxkm_wc_port.h}: in wc_lkm_LockMutex(), when interruptible, check for signals, and add __must_check attribute.

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This commit is contained in:
Daniel Pouzzner
2025-11-04 09:37:37 -06:00
parent d47108c97f
commit 656fe3da7c
2 changed files with 7 additions and 4 deletions
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6
linuxkm/linuxkm_wc_port.h
View File

@@ -1398,7 +1398,7 @@
return 0;
}
static inline int wc_LockMutex(wolfSSL_Mutex* m)
static __must_check inline int wc_LockMutex(wolfSSL_Mutex* m)
{
if (in_nmi() || hardirq_count() || in_softirq())
return -1;
@@ -1443,14 +1443,14 @@
/* wc_lkm_LockMutex() can't be used inline in __PIE__ objects, due to
* direct access to pv_ops.
*/
static __always_inline int wc_LockMutex(wolfSSL_Mutex *m)
static __must_check __always_inline int wc_LockMutex(wolfSSL_Mutex *m)
{
return WC_PIE_INDIRECT_SYM(wc_lkm_LockMutex)(m);
}
#else /* !__PIE__ */
static __always_inline int wc_LockMutex(wolfSSL_Mutex *m)
static __must_check __always_inline int wc_LockMutex(wolfSSL_Mutex *m)
{
return wc_lkm_LockMutex(m);
}

5
linuxkm/module_hooks.c
View File

@@ -172,11 +172,14 @@ int wc_lkm_LockMutex(wolfSSL_Mutex* m)
}
else {
for (;;) {
int sig_ret = wc_linuxkm_check_for_intr_signals();
if (sig_ret)
return sig_ret;
cond_resched();
if (spin_trylock_irqsave(&m->lock, irq_flags)) {
m->irq_flags = irq_flags;
return 0;
}
cond_resched();
}
}
__builtin_unreachable();