Messages in this thread |  | | From | "Mike Black" <> | Subject | Re: Linux 2.4.4-ac3, asm problem in asm-i386/rwsem.h using gcc 3.0 CVS | Date | Thu, 3 May 2001 12:14:57 -0400 |
| |
Looks like if you remove the "inline" from the function definition this compiles OK.
________________________________________ Michael D. Black Principal Engineer mblack@csihq.com 321-676-2923,x203 http://www.csihq.com Computer Science Innovations http://www.csihq.com/~mike My home page FAX 321-676-2355 ----- Original Message ----- From: "Christian Iseli" <chris@ludwig-alpha.unil.ch> To: <linux-kernel@vger.kernel.org> Sent: Wednesday, May 02, 2001 12:13 PM Subject: Linux 2.4.4-ac3, asm problem in asm-i386/rwsem.h using gcc 3.0 CVS
Hi folks,
I currently fail to compile the 2.4.4-ac3 kernel using latest GCC 3.0 from CVS: gcc -D__KERNEL__ -I/usr/src/linux/include -Wall -Wstrict-prototypes -O2 -fomit-frame-pointer -fno-strict-aliasing -pipe -mpreferred-stack-boundary=2 -march=i686 -DEXPORT_SYMTAB -c sys.c sys.c: In function `sys_gethostname': /usr/src/linux/include/asm/rwsem.h:152: inconsistent operand constraints in an `asm'
Here is the code exerpt: /* * unlock after reading */ static inline void __up_read(struct rw_semaphore *sem) { __s32 tmp = -RWSEM_ACTIVE_READ_BIAS; __asm__ __volatile__( "# beginning __up_read\n\t" LOCK_PREFIX " xadd %%edx,(%%eax)\n\t" /* subtracts 1, returns the old value */ " js 2f\n\t" /* jump if the lock is being waited upon */ "1:\n\t" ".section .text.lock,\"ax\"\n" "2:\n\t" " decw %%dx\n\t" /* do nothing if still outstanding active readers */ " jnz 1b\n\t" " pushl %%ecx\n\t" " call rwsem_wake\n\t" " popl %%ecx\n\t" " jmp 1b\n" ".previous\n" "# ending __up_read\n" : "+m"(sem->count), "+d"(tmp) : "a"(sem) : "memory", "cc"); }
I'm afraid I know zilch about asm constraints... Can anybody spot the trouble (and fix it :) ?
Thanks, Christian
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