[PATCH] Celleb: improve htab lock
From: Akira Iguchi <hidden>
Date: 2007-02-09 07:53:09
Disabling IRQ is required only in invalidation. Replace "spin_lock_irqsave" to "spin_lock" in other ops. Signed-off-by: Kou Ishizaki <redacted> Signed-off-by: Akira Iguchi <redacted> --- Index: linux-powerpc-git/arch/powerpc/platforms/celleb/htab.c diff -u linux-powerpc-git/arch/powerpc/platforms/celleb/htab.c:1.1.1.1 linux-powerpc-git/arch/powerpc/platforms/celleb/htab.c:1.10
--- linux-powerpc-git/arch/powerpc/platforms/celleb/htab.c:1.1.1.1 Thu Feb 8 11:38:20 2007
+++ linux-powerpc-git/arch/powerpc/platforms/celleb/htab.c Fri Feb 9 13:44:18 2007@@ -95,7 +95,6 @@ unsigned long lpar_rc; unsigned long slot; unsigned long hpte_v, hpte_r; - unsigned long flags; /* same as iseries */ if (vflags & HPTE_V_SECONDARY)
@@ -115,17 +114,17 @@ if (rflags & (_PAGE_GUARDED|_PAGE_NO_CACHE)) hpte_r &= ~_PAGE_COHERENT; - spin_lock_irqsave(&beat_htab_lock, flags); + spin_lock(&beat_htab_lock); if ((lpar_rc = beat_read_mask(hpte_group)) == 0) { if (!(vflags & HPTE_V_BOLTED)) DBG_LOW(" full\n"); - spin_unlock_irqrestore(&beat_htab_lock, flags); + spin_unlock(&beat_htab_lock); return -1; } lpar_rc = beat_insert_htab_entry(0, hpte_group, lpar_rc << 48, hpte_v, hpte_r, &slot); - spin_unlock_irqrestore(&beat_htab_lock, flags); + spin_unlock(&beat_htab_lock); /* * Since we try and ioremap PHBs we don't own, the pte insert
@@ -189,7 +188,6 @@ { unsigned long lpar_rc; unsigned long dummy0, dummy1, want_v; - unsigned long flags; want_v = hpte_encode_v(va, psize);
@@ -197,17 +195,17 @@ "avpnv=%016lx, slot=%016lx, psize: %d, newpp %016lx ... ", want_v & HPTE_V_AVPN, slot, psize, newpp); - spin_lock_irqsave(&beat_htab_lock, flags); + spin_lock(&beat_htab_lock); dummy0 = beat_lpar_hpte_getword0(slot); if ((dummy0 & ~0x7FUL) != (want_v & ~0x7FUL)) { DBG_LOW("not found !\n"); - spin_unlock_irqrestore(&beat_htab_lock, flags); + spin_unlock(&beat_htab_lock); return -1; } lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0, &dummy1); - spin_unlock_irqrestore(&beat_htab_lock, flags); + spin_unlock(&beat_htab_lock); if (lpar_rc != 0 || dummy0 == 0) { DBG_LOW("not found !\n"); return -1;
@@ -256,18 +254,17 @@ int psize) { unsigned long lpar_rc, slot, vsid, va, dummy0, dummy1; - unsigned long flags; vsid = get_kernel_vsid(ea); va = (vsid << 28) | (ea & 0x0fffffff); - spin_lock_irqsave(&beat_htab_lock, flags); + spin_lock(&beat_htab_lock); slot = beat_lpar_hpte_find(va, psize); BUG_ON(slot == -1); lpar_rc = beat_write_htab_entry(0, slot, 0, newpp, 0, 7, &dummy0, &dummy1); - spin_unlock_irqrestore(&beat_htab_lock, flags); + spin_unlock(&beat_htab_lock); BUG_ON(lpar_rc != 0); }