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ERROR: "__bad_ndelay" [drivers/media/platform/s5p-jpeg/s5p-jpeg.ko] undefined! That happens because asm-generic doesn't like any ndelay time bigger than 20us. Currently, usleep_range() couldn't simply be used, since exynos4_jpeg_sw_reset() is called with a spinlock held. So, let's use udelay() instead. Reported-by: Stephen Rothwell <sfr@canb.auug.org.au> Acked-by: Sylwester Nawrocki <s.nawrocki@samsung.com> Signed-off-by: Mauro Carvalho Chehab <m.chehab@samsung.com>