From mboxrd@z Thu Jan 1 00:00:00 1970 From: akpm@linux-foundation.org Subject: + mn10300-add-cc-clobbers-to-asm-statements.patch added to -mm tree Date: Wed, 06 Jan 2010 16:28:23 -0800 Message-ID: <201001070028.o070SObd027648@imap1.linux-foundation.org> Reply-To: linux-kernel@vger.kernel.org Return-path: Received: from smtp1.linux-foundation.org ([140.211.169.13]:36869 "EHLO smtp1.linux-foundation.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1755569Ab0AGA2m (ORCPT ); Wed, 6 Jan 2010 19:28:42 -0500 Sender: mm-commits-owner@vger.kernel.org List-Id: mm-commits@vger.kernel.org To: mm-commits@vger.kernel.org Cc: msalter@redhat.com, dhowells@redhat.com The patch titled mn10300: add cc clobbers to asm statements has been added to the -mm tree. Its filename is mn10300-add-cc-clobbers-to-asm-statements.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: mn10300: add cc clobbers to asm statements From: Mark Salter gcc 4.2.1 for MN10300 is more agressive than the older gcc in reordering/moving other insns between an insn that sets flags and an insn that uses those flags. This leads to trouble with asm statements which are missing an explicit "cc" clobber. This patch adds the explicit "cc" clobber to asm statements which do indeed clobber the condition flags. Signed-off-by: Mark Salter Signed-off-by: David Howells Signed-off-by: Andrew Morton --- arch/mn10300/include/asm/bitops.h | 4 ++-- arch/mn10300/include/asm/div64.h | 2 ++ arch/mn10300/include/asm/system.h | 1 + arch/mn10300/include/asm/tlbflush.h | 2 +- arch/mn10300/include/asm/uaccess.h | 4 ++-- arch/mn10300/kernel/mn10300-serial.c | 3 ++- arch/mn10300/lib/checksum.c | 1 + arch/mn10300/lib/delay.c | 3 ++- arch/mn10300/lib/usercopy.c | 6 +++--- arch/mn10300/mm/misalignment.c | 4 ++-- 10 files changed, 18 insertions(+), 12 deletions(-) diff -puN arch/mn10300/include/asm/bitops.h~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/include/asm/bitops.h --- a/arch/mn10300/include/asm/bitops.h~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/include/asm/bitops.h @@ -165,7 +165,7 @@ static inline __attribute__((const)) unsigned long __ffs(unsigned long x) { int bit; - asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(x & -x)); + asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(x & -x) : "cc"); return bit; } @@ -177,7 +177,7 @@ static inline __attribute__((const)) int __ilog2_u32(u32 n) { int bit; - asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(n)); + asm("bsch %2,%0" : "=r"(bit) : "0"(0), "r"(n) : "cc"); return bit; } diff -puN arch/mn10300/include/asm/div64.h~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/include/asm/div64.h --- a/arch/mn10300/include/asm/div64.h~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/include/asm/div64.h @@ -72,6 +72,7 @@ unsigned __muldiv64u(unsigned val, unsig * MDR = MDR:val%div */ : "=r"(result) : "0"(val), "ir"(mult), "r"(div) + : "cc" ); return result; @@ -92,6 +93,7 @@ signed __muldiv64s(signed val, signed mu * MDR = MDR:val%div */ : "=r"(result) : "0"(val), "ir"(mult), "r"(div) + : "cc" ); return result; diff -puN arch/mn10300/include/asm/system.h~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/include/asm/system.h --- a/arch/mn10300/include/asm/system.h~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/include/asm/system.h @@ -143,6 +143,7 @@ do { \ " mov %0,epsw \n" \ : "=&d"(tmp) \ : "i"(~EPSW_IM), "r"(__mn10300_irq_enabled_epsw) \ + : "cc" \ ); \ } while (0) diff -puN arch/mn10300/include/asm/tlbflush.h~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/include/asm/tlbflush.h --- a/arch/mn10300/include/asm/tlbflush.h~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/include/asm/tlbflush.h @@ -22,7 +22,7 @@ do { \ " mov %0,%1 \n" \ : "=d"(w) \ : "m"(MMUCTR), "i"(MMUCTR_IIV|MMUCTR_DIV) \ - : "memory" \ + : "cc", "memory" \ ); \ } while (0) diff -puN arch/mn10300/include/asm/uaccess.h~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/include/asm/uaccess.h --- a/arch/mn10300/include/asm/uaccess.h~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/include/asm/uaccess.h @@ -316,7 +316,7 @@ do { \ " .previous\n" \ : "=a"(__from), "=a"(__to), "=r"(size), "=&r"(w)\ : "0"(__from), "1"(__to), "2"(size) \ - : "memory"); \ + : "cc", "memory"); \ } \ } while (0) @@ -352,7 +352,7 @@ do { \ " .previous\n" \ : "=a"(__from), "=a"(__to), "=r"(size), "=&r"(w)\ : "0"(__from), "1"(__to), "2"(size) \ - : "memory"); \ + : "cc", "memory"); \ } \ } while (0) diff -puN arch/mn10300/kernel/mn10300-serial.c~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/kernel/mn10300-serial.c --- a/arch/mn10300/kernel/mn10300-serial.c~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/kernel/mn10300-serial.c @@ -380,7 +380,8 @@ static int mask_test_and_clear(volatile u32 epsw; asm volatile(" bclr %1,(%2) \n" " mov epsw,%0 \n" - : "=d"(epsw) : "d"(mask), "a"(ptr)); + : "=d"(epsw) : "d"(mask), "a"(ptr) + : "cc", "memory"); return !(epsw & EPSW_FLAG_Z); } diff -puN arch/mn10300/lib/checksum.c~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/lib/checksum.c --- a/arch/mn10300/lib/checksum.c~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/lib/checksum.c @@ -22,6 +22,7 @@ static inline unsigned short from32to16( " addc 0xffff,%0 \n" : "=r" (sum) : "r" (sum << 16), "0" (sum & 0xffff0000) + : "cc" ); return sum >> 16; } diff -puN arch/mn10300/lib/delay.c~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/lib/delay.c --- a/arch/mn10300/lib/delay.c~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/lib/delay.c @@ -28,7 +28,8 @@ void __delay(unsigned long loops) "2: add -1,%0 \n" " bne 2b \n" : "=&d" (d0) - : "0" (loops)); + : "0" (loops) + : "cc"); } EXPORT_SYMBOL(__delay); diff -puN arch/mn10300/lib/usercopy.c~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/lib/usercopy.c --- a/arch/mn10300/lib/usercopy.c~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/lib/usercopy.c @@ -62,7 +62,7 @@ do { \ " .previous" \ :"=&r"(res), "=r"(count), "=&r"(w) \ :"i"(-EFAULT), "1"(count), "a"(src), "a"(dst) \ - :"memory"); \ + : "memory", "cc"); \ } while (0) long @@ -109,7 +109,7 @@ do { \ ".previous\n" \ : "+r"(size), "=&r"(w) \ : "a"(addr), "d"(0) \ - : "memory"); \ + : "memory", "cc"); \ } while (0) unsigned long @@ -161,6 +161,6 @@ long strnlen_user(const char *s, long n) ".previous\n" :"=d"(res), "=&r"(w) :"0"(0), "a"(s), "r"(n) - :"memory"); + : "memory", "cc"); return res; } diff -puN arch/mn10300/mm/misalignment.c~mn10300-add-cc-clobbers-to-asm-statements arch/mn10300/mm/misalignment.c --- a/arch/mn10300/mm/misalignment.c~mn10300-add-cc-clobbers-to-asm-statements +++ a/arch/mn10300/mm/misalignment.c @@ -633,13 +633,13 @@ static int misalignment_addr(unsigned lo goto displace_or_inc; case SD24: tmp = disp << 8; - asm("asr 8,%0" : "=r"(tmp) : "0"(tmp)); + asm("asr 8,%0" : "=r"(tmp) : "0"(tmp) : "cc"); disp = (long) tmp; goto displace_or_inc; case SIMM4_2: tmp = opcode >> 4 & 0x0f; tmp <<= 28; - asm("asr 28,%0" : "=r"(tmp) : "0"(tmp)); + asm("asr 28,%0" : "=r"(tmp) : "0"(tmp) : "cc"); disp = (long) tmp; goto displace_or_inc; case IMM8: _ Patches currently in -mm which might be from msalter@redhat.com are mn10300-signal-stack-fix.patch mn10300-objcopy-flags-fix.patch mn10300-add-cc-clobbers-to-asm-statements.patch