/* * Simple pointer stack * * (c) 2010 Arnaldo Carvalho de Melo */ #include "util.h" #include "pstack.h" #include "debug.h" #include #include struct pstack { unsigned short top; unsigned short max_nr_entries; void *entries[0]; }; struct pstack *pstack__new(unsigned short max_nr_entries) { struct pstack *pstack = zalloc((sizeof(*pstack) + max_nr_entries * sizeof(void *))); if (pstack != NULL) pstack->max_nr_entries = max_nr_entries; return pstack; } void pstack__delete(struct pstack *pstack) { free(pstack); } bool pstack__empty(const struct pstack *pstack) { return pstack->top == 0; } void pstack__remove(struct pstack *pstack, void *key) { unsigned short i = pstack->top, last_index = pstack->top - 1; while (i-- != 0) { if (pstack->entries[i] == key) { if (i < last_index) memmove(pstack->entries + i, pstack->entries + i + 1, (last_index - i) * sizeof(void *)); --pstack->top; return; } } pr_err("%s: %p not on the pstack!\n", __func__, key); } void pstack__push(struct pstack *pstack, void *key) { if (pstack->top == pstack->max_nr_entries) { pr_err("%s: top=%d, overflow!\n", __func__, pstack->top); return; } pstack->entries[pstack->top++] = key; } void *pstack__pop(struct pstack *pstack) { void *ret; if (pstack->top == 0) { pr_err("%s: underflow!\n", __func__); return NULL; } ret = pstack->entries[--pstack->top]; pstack->entries[pstack->top] = NULL; return ret; } void *pstack__peek(struct pstack *pstack) { if (pstack->top == 0) return NULL; return pstack->entries[pstack->top - 1]; } 0240f786286ebfaa8ff9227ef38da1720c'>refslog tree commit diff

path: root/net/smc/smc_wr.h

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author	Thomas Gleixner <tglx@linutronix.de>	2017-01-31 19:03:21 +0100
committer	Thomas Gleixner <tglx@linutronix.de>	2017-01-31 20:22:18 +0100
commit	aaaec6fc755447a1d056765b11b24d8ff2b81366 (patch)
tree	a7f4167960ee1df86739905b6ccdeb95465bfe5f /net/mac80211/debugfs_sta.c
parent	08d85f3ea99f1eeafc4e8507936190e86a16ee8c (diff)

x86/irq: Make irq activate operations symmetric

The recent commit which prevents double activation of interrupts unearthed interesting code in x86. The code (ab)uses irq_domain_activate_irq() to reconfigure an already activated interrupt. That trips over the prevention code now. Fix it by deactivating the interrupt before activating the new configuration. Fixes: 08d85f3ea99f1 "irqdomain: Avoid activating interrupts more than once" Reported-and-tested-by: Mike Galbraith <efault@gmx.de> Reported-and-tested-by: Borislav Petkov <bp@alien8.de> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: Andrey Ryabinin <aryabinin@virtuozzo.com> Cc: Marc Zyngier <marc.zyngier@arm.com> Cc: stable@vger.kernel.org Link: http://lkml.kernel.org/r/alpine.DEB.2.20.1701311901580.3457@nanos

Diffstat (limited to 'net/mac80211/debugfs_sta.c')