Merge bk://kernel.bkbits.net/wesolows/sparc32-2.6

into nuts.davemloft.net:/disk1/BK/sparc-2.6

arch/sparc/kernel/entry.S

@@ -288,10 +288,9 @@ bad_trap_handler:
 	wr	%l0, PSR_ET, %psr
 	WRITE_PAUSE
 
-	mov	%l7, %o0		! trap number
-	mov	%l0, %o1		! psr
+	add	%sp, STACKFRAME_SZ, %o0	! pt_regs
 	call	do_hw_interrupt
-	 mov	%l1, %o2		! pc
+	 mov	%l7, %o1		! trap number
 
 	RESTORE_ALL
 	
@@ -350,21 +349,15 @@ smp4m_ticker:
 	 * for cross calls.  That has a separate entry point below.
 	 */
 maybe_smp4m_msg:
-	GET_PROCESSOR_MID(o3)
+	GET_PROCESSOR4M_ID(o3)
 	set	sun4m_interrupts, %l5
 	ld	[%l5], %o5
-	sethi	%hi(0x60000000), %o4
+	sethi	%hi(0x40000000), %o2
 	sll	%o3, 12, %o3
 	ld	[%o5 + %o3], %o1
-	andcc	%o1, %o4, %g0
+	andcc	%o1, %o2, %g0
 	be,a	smp4m_ticker
 	 cmp	%l7, 14
-	sethi	%hi(0x40000000), %o2
-	add	%o5, %o3, %o5
-	andcc	%o1, %o2, %g0
-	be,a	1f
-	 sethi	%hi(0x20000000), %o2
-1:
 	st	%o2, [%o5 + 0x4]
 	WRITE_PAUSE
 	ld	[%o5], %g0
@@ -374,15 +367,9 @@ maybe_smp4m_msg:
 	WRITE_PAUSE
 	wr	%l4, PSR_ET, %psr
 	WRITE_PAUSE
-	srl	%o2, (16+14), %o2
-	tst	%o2
-	bne	2f
-	 nop
 	call	smp_reschedule_irq
-	 add	%o7, 8, %o7
-2:
-	call	smp_stop_cpu_irq
 	 nop
+
 	RESTORE_ALL
 
 	.align	4
@@ -390,7 +377,7 @@ maybe_smp4m_msg:
 linux_trap_ipi15_sun4m:
 	SAVE_ALL
 	sethi	%hi(0x80000000), %o2
-	GET_PROCESSOR_MID(o0)
+	GET_PROCESSOR4M_ID(o0)
 	set	sun4m_interrupts, %l5
 	ld	[%l5], %o5
 	sll	%o0, 12, %o0

arch/sparc/kernel/head.S

@@ -746,9 +746,6 @@ go_to_highmem:
 		jmpl	%g1, %g0
 		 nop
 
-	/* This is to align init_thread_union properly, be careful. -DaveM */
-	.align	8192
-
 /* The code above should be at beginning and we have to take care about
  * short jumps, as branching to .text.init section from .text is usually
  * impossible */

arch/sparc/kernel/init_task.c

@@ -21,5 +21,7 @@ EXPORT_SYMBOL(init_task);
  * If this is not aligned on a 8k boundry, then you should change code
  * in etrap.S which assumes it.
  */
-__asm__(".section \".text\",#alloc\n");
-union thread_union init_thread_union = { INIT_THREAD_INFO(init_task) };
+union thread_union init_thread_union
+	__attribute__((section (".text")))
+	__attribute__((aligned (THREAD_SIZE)))
+	= { INIT_THREAD_INFO(init_task) };

arch/sparc/kernel/module.c

@@ -36,7 +36,9 @@ void module_free(struct module *mod, void *module_region)
            table entries. */
 }
 
-/* Make generic code ignore STT_REGISTER dummy undefined symbols.  */
+/* Make generic code ignore STT_REGISTER dummy undefined symbols,
+ * and replace references to .func with func as in ppc64's dedotify.
+ */
 int module_frob_arch_sections(Elf_Ehdr *hdr,
 			      Elf_Shdr *sechdrs,
 			      char *secstrings,
@@ -44,7 +46,7 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
 {
 	unsigned int symidx;
 	Elf32_Sym *sym;
-	const char *strtab;
+	char *strtab;
 	int i;
 
 	for (symidx = 0; sechdrs[symidx].sh_type != SHT_SYMTAB; symidx++) {
@@ -57,9 +59,15 @@ int module_frob_arch_sections(Elf_Ehdr *hdr,
 	strtab = (char *)sechdrs[sechdrs[symidx].sh_link].sh_addr;
 
 	for (i = 1; i < sechdrs[symidx].sh_size / sizeof(Elf_Sym); i++) {
-		if (sym[i].st_shndx == SHN_UNDEF &&
-		    ELF32_ST_TYPE(sym[i].st_info) == STT_REGISTER)
-			sym[i].st_shndx = SHN_ABS;
+		if (sym[i].st_shndx == SHN_UNDEF) {
+			if (ELF32_ST_TYPE(sym[i].st_info) == STT_REGISTER)
+				sym[i].st_shndx = SHN_ABS;
+			else {
+				char *name = strtab + sym[i].st_name;
+				if (name[0] == '.')
+					memmove(name, name+1, strlen(name));
+			}
+		}
 	}
 	return 0;
 }

arch/sparc/kernel/signal.c

@@ -1128,9 +1128,9 @@ do_sys_sigstack(struct sigstack __user *ssptr, struct sigstack __user *ossptr,
 
 	/* Now see if we want to update the new state. */
 	if (ssptr) {
-		void *ss_sp;
+		char *ss_sp;
 
-		if (get_user((long)ss_sp, &ssptr->the_stack))
+		if (get_user(ss_sp, &ssptr->the_stack))
 			goto out;
 		/* If the current stack was set with sigaltstack, don't
 		   swap stacks while we are on it.  */

arch/sparc/kernel/sparc_ksyms.c

@@ -92,31 +92,21 @@ extern void ___set_bit(void);
 extern void ___clear_bit(void);
 extern void ___change_bit(void);
 
-/* One thing to note is that the way the symbols of the mul/div
- * support routines are named is a mess, they all start with
- * a '.' which makes it a bitch to export, here is the trick:
+/* Alias functions whose names begin with "." and export the aliases.
+ * The module references will be fixed up by module_frob_arch_sections.
  */
+#define DOT_ALIAS2(__ret, __x, __arg1, __arg2) \
+	extern __ret __x(__arg1, __arg2) \
+	             __attribute__((weak, alias("." # __x)));
 
-/* If the interface of any of these special functions does ever
- * change in an incompatible way, you must modify this.
- */
-#define DOT_PROTO(sym) extern int __dot_##sym(int, int)
-
-#ifdef __GENKSYMS__
-#define EXPORT_SYMBOL_DOT(sym)						\
-	DOT_PROTO(sym);							\
-	EXPORT_SYMBOL(__dot_ ## sym)
-#else /* !__GENKSYMS__ */
-#define EXPORT_SYMBOL_DOT(sym)						\
-	DOT_PROTO(sym) __asm__("." # sym);				\
-	__CRC_SYMBOL(__dot_##sym, "")					\
-	static const char __kstrtab___dot_##sym[]			\
-	__attribute__((section("__ksymtab_strings")))			\
-	= "." #sym;							\
-	static const struct kernel_symbol __ksymtab___dot_##sym		\
-	__attribute__((section("__ksymtab")))				\
-	= { (unsigned long)&__dot_##sym, __kstrtab___dot_##sym }
-#endif
+DOT_ALIAS2(int, div, int, int)
+DOT_ALIAS2(int, mul, int, int)
+DOT_ALIAS2(int, rem, int, int)
+DOT_ALIAS2(unsigned, udiv, unsigned, unsigned)
+DOT_ALIAS2(unsigned, umul, unsigned, unsigned)
+DOT_ALIAS2(unsigned, urem, unsigned, unsigned)
+
+#undef DOT_ALIAS2
 
 /* used by various drivers */
 EXPORT_SYMBOL(sparc_cpu_model);
@@ -180,21 +170,20 @@ EXPORT_SYMBOL(io_remap_page_range);
 /* EXPORT_SYMBOL(iounit_map_dma_init); */
 /* EXPORT_SYMBOL(iounit_map_dma_page); */
 
-/* Btfixup stuff cannot have versions, it would be complicated too much */
 #ifndef CONFIG_SMP
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(___xchg32));
+EXPORT_SYMBOL(BTFIXUP_CALL(___xchg32));
 #else
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(__smp_processor_id));
+EXPORT_SYMBOL(BTFIXUP_CALL(__hard_smp_processor_id));
 #endif
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(enable_irq));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(disable_irq));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(__irq_itoa));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_unlockarea));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_lockarea));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_get_scsi_sgl));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_get_scsi_one));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_release_scsi_sgl));
-EXPORT_SYMBOL_NOVERS(BTFIXUP_CALL(mmu_release_scsi_one));
+EXPORT_SYMBOL(BTFIXUP_CALL(enable_irq));
+EXPORT_SYMBOL(BTFIXUP_CALL(disable_irq));
+EXPORT_SYMBOL(BTFIXUP_CALL(__irq_itoa));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_unlockarea));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_lockarea));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_get_scsi_sgl));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_get_scsi_one));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_sgl));
+EXPORT_SYMBOL(BTFIXUP_CALL(mmu_release_scsi_one));
 
 #ifdef CONFIG_SBUS
 EXPORT_SYMBOL(sbus_root);
@@ -271,15 +260,15 @@ EXPORT_SYMBOL(__prom_getsibling);
 /* sparc library symbols */
 EXPORT_SYMBOL(bcopy);
 EXPORT_SYMBOL(memchr);
-EXPORT_SYMBOL_NOVERS(memscan);
-EXPORT_SYMBOL_NOVERS(strlen);
+EXPORT_SYMBOL(memscan);
+EXPORT_SYMBOL(strlen);
 EXPORT_SYMBOL(strnlen);
 EXPORT_SYMBOL(strcpy);
 EXPORT_SYMBOL(strncpy);
 EXPORT_SYMBOL(strcat);
 EXPORT_SYMBOL(strncat);
 EXPORT_SYMBOL(strcmp);
-EXPORT_SYMBOL_NOVERS(strncmp);
+EXPORT_SYMBOL(strncmp);
 EXPORT_SYMBOL(strchr);
 EXPORT_SYMBOL(strrchr);
 EXPORT_SYMBOL(strpbrk);
@@ -309,28 +298,24 @@ EXPORT_SYMBOL(csum_partial);
 /* Cache flushing.  */
 EXPORT_SYMBOL(sparc_flush_page_to_ram);
 
-/* No version information on this, heavily used in inline asm,
- * and will always be 'void __ret_efault(void)'.
- */
-EXPORT_SYMBOL_NOVERS(__ret_efault);
-
-/* No version information on these, as gcc produces such symbols. */
-EXPORT_SYMBOL_NOVERS(memcmp);
-EXPORT_SYMBOL_NOVERS(memcpy);
-EXPORT_SYMBOL_NOVERS(memset);
-EXPORT_SYMBOL_NOVERS(memmove);
-EXPORT_SYMBOL_NOVERS(__ashrdi3);
-EXPORT_SYMBOL_NOVERS(__ashldi3);
-EXPORT_SYMBOL_NOVERS(__lshrdi3);
-EXPORT_SYMBOL_NOVERS(__muldi3);
-EXPORT_SYMBOL_NOVERS(__divdi3);
-
-EXPORT_SYMBOL_DOT(rem);
-EXPORT_SYMBOL_DOT(urem);
-EXPORT_SYMBOL_DOT(mul);
-EXPORT_SYMBOL_DOT(umul);
-EXPORT_SYMBOL_DOT(div);
-EXPORT_SYMBOL_DOT(udiv);
+EXPORT_SYMBOL(__ret_efault);
+
+EXPORT_SYMBOL(memcmp);
+EXPORT_SYMBOL(memcpy);
+EXPORT_SYMBOL(memset);
+EXPORT_SYMBOL(memmove);
+EXPORT_SYMBOL(__ashrdi3);
+EXPORT_SYMBOL(__ashldi3);
+EXPORT_SYMBOL(__lshrdi3);
+EXPORT_SYMBOL(__muldi3);
+EXPORT_SYMBOL(__divdi3);
+
+EXPORT_SYMBOL(rem);
+EXPORT_SYMBOL(urem);
+EXPORT_SYMBOL(mul);
+EXPORT_SYMBOL(umul);
+EXPORT_SYMBOL(div);
+EXPORT_SYMBOL(udiv);
 
 #ifdef CONFIG_DEBUG_BUGVERBOSE
 EXPORT_SYMBOL(do_BUG);

arch/sparc/kernel/sys_sunos.c

@@ -343,7 +343,7 @@ static int sunos_filldir(void * __buf, const char * name, int namlen,
 	put_user(reclen, &dirent->d_reclen);
 	copy_to_user(dirent->d_name, name, namlen);
 	put_user(0, dirent->d_name + namlen);
-	((char *) dirent) += reclen;
+	dirent = (void *)dirent + reclen;
 	buf->curr = dirent;
 	buf->count -= reclen;
 	return 0;
@@ -422,7 +422,7 @@ static int sunos_filldirentry(void * __buf, const char * name, int namlen,
 	put_user(reclen, &dirent->d_reclen);
 	copy_to_user(dirent->d_name, name, namlen);
 	put_user(0, dirent->d_name + namlen);
-	((char *) dirent) += reclen;
+	dirent = (void *)dirent + reclen;
 	buf->curr = dirent;
 	buf->count -= reclen;
 	return 0;

arch/sparc/kernel/traps.c

@@ -131,23 +131,23 @@ void die_if_kernel(char *str, struct pt_regs *regs)
 	do_exit(SIGSEGV);
 }
 
-void do_hw_interrupt(unsigned long type, unsigned long psr, unsigned long pc)
+void do_hw_interrupt(struct pt_regs *regs, unsigned long type)
 {
 	siginfo_t info;
 
 	if(type < 0x80) {
 		/* Sun OS's puke from bad traps, Linux survives! */
 		printk("Unimplemented Sparc TRAP, type = %02lx\n", type);
-		die_if_kernel("Whee... Hello Mr. Penguin", current->thread.kregs);
+		die_if_kernel("Whee... Hello Mr. Penguin", regs);
 	}	
 
-	if(psr & PSR_PS)
-		die_if_kernel("Kernel bad trap", current->thread.kregs);
+	if(regs->psr & PSR_PS)
+		die_if_kernel("Kernel bad trap", regs);
 
 	info.si_signo = SIGILL;
 	info.si_errno = 0;
 	info.si_code = ILL_ILLTRP;
-	info.si_addr = (void *)pc;
+	info.si_addr = (void *)regs->pc;
 	info.si_trapno = type - 0x80;
 	force_sig_info(SIGILL, &info, current);
 }

arch/sparc/lib/Makefile

@@ -7,5 +7,7 @@ EXTRA_AFLAGS := -ansi -DST_DIV0=0x02
 lib-y := mul.o rem.o sdiv.o udiv.o umul.o urem.o ashrdi3.o memcpy.o memset.o \
          strlen.o checksum.o blockops.o memscan.o memcmp.o strncmp.o \
 	 strncpy_from_user.o divdi3.o udivdi3.o strlen_user.o \
-	 copy_user.o locks.o atomic.o atomic32.o bitops.o debuglocks.o \
+	 copy_user.o locks.o atomic.o atomic32.o bitops.o \
 	 lshrdi3.o ashldi3.o rwsem.o muldi3.o bitext.o
+
+lib-$(CONFIG_DEBUG_SPINLOCK) +=	debuglocks.o

arch/sparc/lib/debuglocks.c

@@ -12,8 +12,7 @@
 #include <asm/psr.h>
 #include <asm/system.h>
 
-/* To enable this code, just define SPIN_LOCK_DEBUG in asm/spinlock.h */
-#ifdef SPIN_LOCK_DEBUG
+#ifdef CONFIG_SMP
 
 /* Some notes on how these debugging routines work.  When a lock is acquired
  * an extra debugging member lock->owner_pc is set to the caller of the lock
@@ -200,4 +199,4 @@ void _do_write_unlock(rwlock_t *rw)
 	rw->lock = 0;
 }
 
-#endif /* SPIN_LOCK_DEBUG */
+#endif /* SMP */

arch/sparc/math-emu/math.c

@@ -327,6 +327,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 #ifdef DEBUG_MATHEMU
 			printk("unknown FPop1: %03lx\n",(insn>>5)&0x1ff);
 #endif
+			break;
 		}
 	} else if ((insn & 0xc1f80000) == 0x81a80000)	/* FPOP2 */ {
 		switch ((insn >> 5) & 0x1ff) {
@@ -340,6 +341,7 @@ static int do_one_mathemu(u32 insn, unsigned long *pfsr, unsigned long *fregs)
 #ifdef DEBUG_MATHEMU
 			printk("unknown FPop2: %03lx\n",(insn>>5)&0x1ff);
 #endif
+			break;
 		}
 	}
 

include/asm-sparc/asmmacro.h

@@ -18,17 +18,6 @@
 #define GET_PROCESSOR4D_ID(reg) \
 	lda	[%g0] ASI_M_VIKING_TMP1, %reg;
 
-/* Blackbox */
-#define GET_PROCESSOR_ID(reg) \
-	sethi	%hi(___b_smp_processor_id), %reg; \
-	sethi	%hi(boot_cpu_id), %reg; \
-	ldub	[%reg + %lo(boot_cpu_id)], %reg;
-
-#define GET_PROCESSOR_MID(reg) \
-	rd	%tbr, %reg; \
-	srl	%reg, 12, %reg; \
-	and	%reg, 3, %reg;
-
 /* All trap entry points _must_ begin with this macro or else you
  * lose.  It makes sure the kernel has a proper window so that
  * c-code can be called.

include/asm-sparc/smp.h

@@ -53,8 +53,8 @@ void smp_info(struct seq_file *);
 
 BTFIXUPDEF_CALL(void, smp_cross_call, smpfunc_t, unsigned long, unsigned long, unsigned long, unsigned long, unsigned long)
 BTFIXUPDEF_CALL(void, smp_message_pass, int, int, unsigned long, int)
-BTFIXUPDEF_CALL(int, __smp_processor_id, void)
-BTFIXUPDEF_BLACKBOX(smp_processor_id)
+BTFIXUPDEF_CALL(int, __hard_smp_processor_id, void)
+BTFIXUPDEF_BLACKBOX(hard_smp_processor_id)
 BTFIXUPDEF_BLACKBOX(load_current)
 
 #define smp_cross_call(func,arg1,arg2,arg3,arg4,arg5) BTFIXUP_CALL(smp_cross_call)(func,arg1,arg2,arg3,arg4,arg5)
@@ -129,7 +129,7 @@ extern __inline__ int hard_smp_processor_id(void)
 	   			     "=&r" (cpuid));
 	   See btfixup.h and btfixupprep.c to understand how a blackbox works.
 	 */
-	__asm__ __volatile__("sethi %%hi(___b_smp_processor_id), %0\n\t"
+	__asm__ __volatile__("sethi %%hi(___b_hard_smp_processor_id), %0\n\t"
 			     "sethi %%hi(boot_cpu_id), %0\n\t"
 			     "ldub [%0 + %%lo(boot_cpu_id)], %0\n\t" :
 			     "=&r" (cpuid));
@@ -141,7 +141,7 @@ extern __inline__ int hard_smp_processor_id(void)
 	int cpuid;
 	
 	__asm__ __volatile__("mov %%o7, %%g1\n\t"
-			     "call ___f___smp_processor_id\n\t"
+			     "call ___f___hard_smp_processor_id\n\t"
 			     " nop\n\t"
 			     "mov %%g2, %0\n\t" : "=r"(cpuid) : : "g1", "g2");
 	return cpuid;

scripts/modpost.c

@@ -141,26 +141,14 @@ new_symbol(const char *name, struct module *module, unsigned int *crc)
 	symbolhash[hash] = new;
 }
 
-#define DOTSYM_PFX "__dot_"
-
 struct symbol *
 find_symbol(const char *name)
 {
 	struct symbol *s;
-	char dotname[64 + sizeof(DOTSYM_PFX)];
 
-	/* .foo matches foo.  PPC64 needs this. */
-	if (name[0] == '.') {
+	/* For our purposes, .foo matches foo.  PPC64 needs this. */
+	if (name[0] == '.')
 		name++;
-		strcpy(dotname, DOTSYM_PFX);
-		strncat(dotname, name, sizeof(dotname) - sizeof(DOTSYM_PFX) - 1);
-		dotname[sizeof(dotname)-1] = 0;
-		/* Sparc32 wants .foo to match __dot_foo, try this first. */
-		for (s = symbolhash[tdb_hash(dotname) % SYMBOL_HASH_SIZE]; s; s=s->next) {
-			if (strcmp(s->name, dotname) == 0)
-				return s;
-		}
-	}
 
 	for (s = symbolhash[tdb_hash(name) % SYMBOL_HASH_SIZE]; s; s=s->next) {
 		if (strcmp(s->name, name) == 0)