1. 03 Jul, 2009 2 commits
  2. 02 Jul, 2009 4 commits
    • Yinghai Lu's avatar
      x86: add boundary check for 32bit res before expand e820 resource to alignment · 7c5371c4
      Yinghai Lu authored
      fix hang with HIGHMEM_64G and 32bit resource.  According to hpa and
      Linus, use (resource_size_t)-1 to fend off big ranges.
      
      Analyzed by hpa
      Reported-and-tested-by: default avatarMikael Pettersson <mikpe@it.uu.se>
      Signed-off-by: default avatarYinghai Lu <yinghai@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      7c5371c4
    • Linus Torvalds's avatar
      x86: fix power-of-2 round_up/round_down macros · 43644679
      Linus Torvalds authored
      These macros had two bugs:
       - the type of the mask was not correctly expanded to the full size of
         the argument being expanded, resulting in possible loss of high bits
         when mixing types.
       - the alignment argument was evaluated twice, despite the macro looking
         like a fancy function (but it really does need to be a macro, since
         it works on arbitrary integer types)
      
      Noticed by Peter Anvin, and with a fix that is a modification of his
      suggestion (bug noticed by Yinghai Lu).
      
      Cc: Peter Anvin <hpa@zytor.com>
      Cc: Yinghai Lu <yinghai@kernel.org>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      43644679
    • David Howells's avatar
      FRV: Add basic performance counter support · 42ca4fb6
      David Howells authored
      Add basic performance counter support to the FRV arch.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      42ca4fb6
    • David Howells's avatar
      FRV: Implement atomic64_t · 00460f41
      David Howells authored
      Implement atomic64_t and its ops for FRV.  Tested with the following patch:
      
      	diff --git a/arch/frv/kernel/setup.c b/arch/frv/kernel/setup.c
      	index 55e4fab..086d50d 100644
      	--- a/arch/frv/kernel/setup.c
      	+++ b/arch/frv/kernel/setup.c
      	@@ -746,6 +746,52 @@ static void __init parse_cmdline_early(char *cmdline)
      
      	 } /* end parse_cmdline_early() */
      
      	+static atomic64_t xxx;
      	+
      	+static void test_atomic64(void)
      	+{
      	+	atomic64_set(&xxx, 0x12300000023LL);
      	+
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0x12300000023LL);
      	+	mb();
      	+	if (atomic64_inc_return(&xxx) != 0x12300000024LL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0x12300000024LL);
      	+	mb();
      	+	if (atomic64_sub_return(0x36900000050LL, &xxx) != -0x2460000002cLL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != -0x2460000002cLL);
      	+	mb();
      	+	if (atomic64_dec_return(&xxx) != -0x2460000002dLL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != -0x2460000002dLL);
      	+	mb();
      	+	if (atomic64_add_return(0x36800000001LL, &xxx) != 0x121ffffffd4LL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
      	+	mb();
      	+	if (atomic64_cmpxchg(&xxx, 0x123456789abcdefLL, 0x121ffffffd4LL) != 0x121ffffffd4LL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0x121ffffffd4LL);
      	+	mb();
      	+	if (atomic64_cmpxchg(&xxx, 0x121ffffffd4LL, 0x123456789abcdefLL) != 0x121ffffffd4LL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0x123456789abcdefLL);
      	+	mb();
      	+	if (atomic64_xchg(&xxx, 0xabcdef123456789LL) != 0x123456789abcdefLL)
      	+		BUG();
      	+	mb();
      	+	BUG_ON(atomic64_read(&xxx) != 0xabcdef123456789LL);
      	+	mb();
      	+}
      	+
      	 /*****************************************************************************/
      	 /*
      	  *
      	@@ -845,6 +891,8 @@ void __init setup_arch(char **cmdline_p)
      	 //	asm volatile("movgs %0,timerd" :: "r"(10000000));
      	 //	__set_HSR(0, __get_HSR(0) | HSR0_ETMD);
      
      	+	test_atomic64();
      	+
      	 } /* end setup_arch() */
      
      	 #if 0
      
      Note that this doesn't cover all the trivial wrappers, but does cover all the
      substantial implementations.
      Signed-off-by: default avatarDavid Howells <dhowells@redhat.com>
      Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
      00460f41
  3. 01 Jul, 2009 34 commits