from: Marc Pignat <[EMAIL PROTECTED]> kunmap must be called on the pointer returned by kmap.
Signed-off-by: Marc Pignat <[EMAIL PROTECTED]> --- N.B: This is the same patch as yesterday, with proper Signed-off-by and more comments. The buffer variable is used this way: buffer = kmap_atomic(sg->page, KM_BIO_SRC_IRQ) + sg->offset; So we can't do kunmap_atomic(buffer, KM_BIO_SRC_IRQ); we must do kunmap_atomic(buffer - sg->offset, KM_BIO_SRC_IRQ); Strangely this misuse showed no problem using CONFIG_SLAB, but oops using CONFIG_SLUB, (lkml ''Oops in a driver while using SLUB as a SLAB allocator"). Regards Marc --- drivers/mmc/host/at91_mci.c-2.6.22-rc5.orig 2007-06-21 16:27:31.000000000 +0200 +++ drivers/mmc/host/at91_mci.c-2.6.22-rc5 2007-06-21 16:42:48.000000000 +0200 @@ -164,7 +164,7 @@ static inline void at91mci_sg_to_dma(str else memcpy(dmabuf, sgbuffer, amount); - kunmap_atomic(sgbuffer, KM_BIO_SRC_IRQ); + kunmap_atomic(sgbuffer - sg->offset, KM_BIO_SRC_IRQ); if (size == 0) break; @@ -293,7 +293,7 @@ static void at91mci_post_dma_read(struct buffer[index] = swab32(buffer[index]); } - kunmap_atomic(buffer, KM_BIO_SRC_IRQ); + kunmap_atomic(buffer - sg->offset, KM_BIO_SRC_IRQ); flush_dcache_page(sg->page); } - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/