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David Daney authored
commit 92d11594 (MIPS: Remove irqflags.h dependency from bitops.h) factored some of the bitops code out into a separate file (arch/mips/lib/bitops.c). Unfortunately the logic converting a bit mask into a boolean result was lost in some of the functions. We had: int res; unsigned long shifted_result_bit; . . . res = shifted_result_bit; return res; Which truncates off the high 32 bits (thus yielding an incorrect value) on 64-bit systems. The manifestation of this is that a non-SMP 64-bit kernel will not boot as the bitmap operations in bootmem.c are all screwed up. Signed-off-by:
David Daney <david.daney@cavium.com> Cc: linux-mips@linux-mips.org Cc: Jim Quinlan <jim2101024@gmail.com> Cc: stable@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/4965/Signed-off-by:
Ralf Baechle <ralf@linux-mips.org>
0c81157b