The patch titled um: remove PAGE_SIZE alignment in linker script causing kernel segfault. has been added to the -mm tree. Its filename is um-remove-page_size-alignment-in-linker-script-causing-kernel-segfault.patch Before you just go and hit "reply", please: a) Consider who else should be cc'ed b) Prefer to cc a suitable mailing list as well c) Ideally: find the original patch on the mailing list and do a reply-to-all to that, adding suitable additional cc's *** Remember to use Documentation/SubmitChecklist when testing your code *** See http://userweb.kernel.org/~akpm/stuff/added-to-mm.txt to find out what to do about this The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/ ------------------------------------------------------ Subject: um: remove PAGE_SIZE alignment in linker script causing kernel segfault. From: Richard Weinberger <richard@xxxxxx> The linker script cleanup that I did in commit 5d150a97f93 ("um: Clean up linker script using standard macros.") (2.6.32) accidentally introduced an ALIGN(PAGE_SIZE) when converting to use INIT_TEXT_SECTION; Richard Weinberger reported that this causes the kernel to segfault with CONFIG_STATIC_LINK=y. I'm not certain why this extra alignment is a problem, but it seems likely it is because previously __init_begin = _stext = _text = _sinittext and with the extra ALIGN(PAGE_SIZE), _sinittext becomes different from the rest. So there is likely a bug here where something is assuming that _sinittext is the same as one of those other symbols. But reverting the accidental change fixes the regression, so it seems worth committing that now. Signed-off-by: Tim Abbott <tabbott@xxxxxxxxxxx> Reported-by: Richard Weinberger <richard@xxxxxx> Cc: Jeff Dike <jdike@xxxxxxxxxxx> Cc: <stable@xxxxxxxxxx> Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx> --- arch/um/kernel/uml.lds.S | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff -puN arch/um/kernel/uml.lds.S~um-remove-page_size-alignment-in-linker-script-causing-kernel-segfault arch/um/kernel/uml.lds.S --- a/arch/um/kernel/uml.lds.S~um-remove-page_size-alignment-in-linker-script-causing-kernel-segfault +++ a/arch/um/kernel/uml.lds.S @@ -22,7 +22,7 @@ SECTIONS _text = .; _stext = .; __init_begin = .; - INIT_TEXT_SECTION(PAGE_SIZE) + INIT_TEXT_SECTION(0) . = ALIGN(PAGE_SIZE); .text : _ Patches currently in -mm which might be from richard@xxxxxx are origin.patch hostfs-fix-uml-crash.patch um-fix-global-timer-issue-when-using-config_no_hz.patch um-remove-page_size-alignment-in-linker-script-causing-kernel-segfault.patch um-migrate-from-__do_irq-to-generic_handle_irq.patch -- To unsubscribe from this list: send the line "unsubscribe mm-commits" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html