Do not inline putprops function With the recent kexec-tools git tree, both kexec and kdump kernels hang (i.e kexec -l and kexec -p respectively). This happened after the patch "ppc64: cleanups" commit b43a84a31a4be6ed025c1bdef3bb1c3c12e01b16. I tried reverting each hunk and then found out that retaining following lines in fs2dt.c makes kexec/kdump work.
-static unsigned *dt_len; /* changed len of modified cmdline - in flat device-tree */ [....] - dt_len = dt; I don't have any clue why removing a unused variable would cause the kexec kernel to hang. After further investigation, I observed that if the putprops function is not inlined, kexec/kdump kernel would work even after removing the above lines. This patch directs gcc to not inline the putprops function. Now we could invoke kexec and kdump kernels. --- kexec/arch/ppc64/fs2dt.c | 2 +- 1 files changed, 1 insertions(+), 1 deletions(-) diff --git a/kexec/arch/ppc64/fs2dt.c b/kexec/arch/ppc64/fs2dt.c index 1f551fd..1e01f74 100644 --- a/kexec/arch/ppc64/fs2dt.c +++ b/kexec/arch/ppc64/fs2dt.c @@ -259,7 +259,7 @@ static void add_usable_mem_property(int fd, int len) } /* put all properties (files) in the property structure */ -static void putprops(char *fn, struct dirent **nlist, int numlist) +__attribute__ ((noinline)) static void putprops(char *fn, struct dirent **nlist, int numlist) { struct dirent *dp; int i = 0, fd, len; -- 1.6.0.6 _______________________________________________ Linuxppc-dev mailing list Linuxppc-dev@lists.ozlabs.org https://lists.ozlabs.org/listinfo/linuxppc-dev