Revert "powerpc/tm: Always reclaim in start_thread() for exec() class syscalls"

This reverts commit 8110080d.

Guenter noticed that this breaks PPC build when CONFIG_PPC_TRANSACTIONAL_MEM
is set, because this patch was not for 3.10.

Cc: Guenter Roeck <linux@roeck-us.net>
Signed-off-by: Willy Tarreau <w@1wt.eu>

arch/powerpc/kernel/process.c

@@ -1088,16 +1088,6 @@ void start_thread(struct pt_regs *regs, unsigned long start, unsigned long sp)
 		current->thread.regs = regs - 1;
 	}
 
-#ifdef CONFIG_PPC_TRANSACTIONAL_MEM
-	/*
-	 * Clear any transactional state, we're exec()ing. The cause is
-	 * not important as there will never be a recheckpoint so it's not
-	 * user visible.
-	 */
-	if (MSR_TM_SUSPENDED(mfmsr()))
-		tm_reclaim_current(0);
-#endif
-
 	memset(regs->gpr, 0, sizeof(regs->gpr));
 	regs->ctr = 0;
 	regs->link = 0;