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authorAndrew Morton <akpm@osdl.org>2006-12-06 20:39:59 -0800
committerLinus Torvalds <torvalds@woody.osdl.org>2006-12-07 08:39:44 -0800
commitf1a60dbf68061e5a5364cbc723786b355637ffd3 (patch)
treeaa7f94e27e7fe110e2729ef1202b486442d1caa8 /init
parent[PATCH] amba-pl010: clear error flags on rx error (diff)
downloadlinux-dev-f1a60dbf68061e5a5364cbc723786b355637ffd3.tar.xz
linux-dev-f1a60dbf68061e5a5364cbc723786b355637ffd3.zip
[PATCH] gcc-4.1.0 is bust
Keith says Compiling 2.6.19-rc6 with gcc version 4.1.0 (SUSE Linux), wait_hpet_tick is optimized away to a never ending loop and the kernel hangs on boot in timer setup. 0000001a <wait_hpet_tick>: 1a: 55 push %ebp 1b: 89 e5 mov %esp,%ebp 1d: eb fe jmp 1d <wait_hpet_tick+0x3> This is not a problem with gcc 3.3.5. Adding barrier() calls to wait_hpet_tick does not help, making the variables volatile does. And the consensus is that gcc-4.1.0 is busted. Suse went and shipped gcc-4.1.0 so we cannot ban it. Add a warning. Cc: Keith Owens <kaos@ocs.com.au> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'init')
-rw-r--r--init/main.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/init/main.c b/init/main.c
index 36f608a7cfba..46508300d6b9 100644
--- a/init/main.c
+++ b/init/main.c
@@ -73,6 +73,10 @@
#error Sorry, your GCC is too old. It builds incorrect kernels.
#endif
+#if __GNUC__ == 4 && __GNUC_MINOR__ == 1 && __GNUC_PATCHLEVEL__ == 0
+#warning gcc-4.1.0 is known to miscompile the kernel. A different compiler version is recommended.
+#endif
+
static int init(void *);
extern void init_IRQ(void);