Patch "IB/qib: rename BITS_PER_PAGE to RVT_BITS_PER_PAGE" has been added to the 4.4-stable tree

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This is a note to let you know that I've just added the patch titled

    IB/qib: rename BITS_PER_PAGE to RVT_BITS_PER_PAGE

to the 4.4-stable tree which can be found at:
    http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary

The filename of the patch is:
     ib-qib-rename-bits_per_page-to-rvt_bits_per_page.patch
and it can be found in the queue-4.4 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.


>From arnd@xxxxxxxx  Thu May  4 15:29:57 2017
From: Arnd Bergmann <arnd@xxxxxxxx>
Date: Thu,  4 May 2017 22:52:02 +0200
Subject: IB/qib: rename BITS_PER_PAGE to RVT_BITS_PER_PAGE
To: gregkh@xxxxxxxxxxxxxxxxxxx
Cc: stable@xxxxxxxxxxxxxxx, Arnd Bergmann <arnd@xxxxxxxx>
Message-ID: <20170504205209.498721-7-arnd@xxxxxxxx>

From: Arnd Bergmann <arnd@xxxxxxxx>

We get this build warning on arm64

drivers/infiniband/hw/qib/qib_qp.c:44:0: error: "BITS_PER_PAGE" redefined [-Werror]
 #define BITS_PER_PAGE           (PAGE_SIZE*BITS_PER_BYTE)

This is fixed upstream in commit 898fa52b4ac3 ("IB/qib: Remove qpn, qp tables and
related variables from qib"), which does a lot of other things as well.

Instead, I just backport the rename of the local BITS_PER_PAGE definition to
RVT_BITS_PER_PAGE.

The driver first showed up in linux-2.6.35, and the fixup should still apply
to that. The upstream fix went into v4.6, so we could apply this workaround
to both 3.18 and 4.4.

Fixes: f931551bafe1 ("IB/qib: Add new qib driver for QLogic PCIe InfiniBand adapters")
Signed-off-by: Arnd Bergmann <arnd@xxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>
---
 drivers/infiniband/hw/qib/qib_qp.c |   18 +++++++++---------
 1 file changed, 9 insertions(+), 9 deletions(-)

--- a/drivers/infiniband/hw/qib/qib_qp.c
+++ b/drivers/infiniband/hw/qib/qib_qp.c
@@ -41,13 +41,13 @@
 
 #include "qib.h"
 
-#define BITS_PER_PAGE           (PAGE_SIZE*BITS_PER_BYTE)
-#define BITS_PER_PAGE_MASK      (BITS_PER_PAGE-1)
+#define RVT_BITS_PER_PAGE           (PAGE_SIZE*BITS_PER_BYTE)
+#define RVT_BITS_PER_PAGE_MASK      (RVT_BITS_PER_PAGE-1)
 
 static inline unsigned mk_qpn(struct qib_qpn_table *qpt,
 			      struct qpn_map *map, unsigned off)
 {
-	return (map - qpt->map) * BITS_PER_PAGE + off;
+	return (map - qpt->map) * RVT_BITS_PER_PAGE + off;
 }
 
 static inline unsigned find_next_offset(struct qib_qpn_table *qpt,
@@ -59,7 +59,7 @@ static inline unsigned find_next_offset(
 		if (((off & qpt->mask) >> 1) >= n)
 			off = (off | qpt->mask) + 2;
 	} else
-		off = find_next_zero_bit(map->page, BITS_PER_PAGE, off);
+		off = find_next_zero_bit(map->page, RVT_BITS_PER_PAGE, off);
 	return off;
 }
 
@@ -147,8 +147,8 @@ static int alloc_qpn(struct qib_devdata
 		qpn = 2;
 	if (qpt->mask && ((qpn & qpt->mask) >> 1) >= dd->n_krcv_queues)
 		qpn = (qpn | qpt->mask) + 2;
-	offset = qpn & BITS_PER_PAGE_MASK;
-	map = &qpt->map[qpn / BITS_PER_PAGE];
+	offset = qpn & RVT_BITS_PER_PAGE_MASK;
+	map = &qpt->map[qpn / RVT_BITS_PER_PAGE];
 	max_scan = qpt->nmaps - !offset;
 	for (i = 0;;) {
 		if (unlikely(!map->page)) {
@@ -173,7 +173,7 @@ static int alloc_qpn(struct qib_devdata
 			 * We just need to be sure we don't loop
 			 * forever.
 			 */
-		} while (offset < BITS_PER_PAGE && qpn < QPN_MAX);
+		} while (offset < RVT_BITS_PER_PAGE && qpn < QPN_MAX);
 		/*
 		 * In order to keep the number of pages allocated to a
 		 * minimum, we scan the all existing pages before increasing
@@ -204,9 +204,9 @@ static void free_qpn(struct qib_qpn_tabl
 {
 	struct qpn_map *map;
 
-	map = qpt->map + qpn / BITS_PER_PAGE;
+	map = qpt->map + qpn / RVT_BITS_PER_PAGE;
 	if (map->page)
-		clear_bit(qpn & BITS_PER_PAGE_MASK, map->page);
+		clear_bit(qpn & RVT_BITS_PER_PAGE_MASK, map->page);
 }
 
 static inline unsigned qpn_hash(struct qib_ibdev *dev, u32 qpn)


Patches currently in stable-queue which might be from arnd@xxxxxxxx are

queue-4.4/alsa-ppc-awacs-shut-up-maybe-uninitialized-warning.patch
queue-4.4/net-tg3-avoid-uninitialized-variable-warning.patch
queue-4.4/mtd-avoid-stack-overflow-in-mtd-cfi-code.patch
queue-4.4/ib-qib-rename-bits_per_page-to-rvt_bits_per_page.patch
queue-4.4/drbd-avoid-redefinition-of-bits_per_page.patch
queue-4.4/ib-ehca-fix-maybe-uninitialized-warnings.patch



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