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Date: Wed, 10 Feb 2016 22:01:40 +0100
From: Arnd Bergmann <arnd@...db.de>
To: Andrzej Hajda <a.hajda@...sung.com>
Cc: Andrew Morton <akpm@...ux-foundation.org>,
Bartlomiej Zolnierkiewicz <b.zolnierkie@...sung.com>,
Marek Szyprowski <m.szyprowski@...sung.com>,
open list <linux-kernel@...r.kernel.org>,
Bob Peterson <rpeterso@...hat.com>, linux@...musvillemoes.dk
Subject: Re: [PATCH v3] err.h: allow IS_ERR_VALUE to handle properly more types
On Tuesday 09 February 2016 09:42:26 Andrzej Hajda wrote:
> +cc Rasmus Villemoes, I forgot to add him earlier.
>
> On 02/08/2016 01:01 PM, Arnd Bergmann wrote:
> > On Monday 08 February 2016 09:45:55 Andrzej Hajda wrote:
> >> On 02/05/2016 11:52 AM, Arnd Bergmann wrote:
> >>> On Thursday 04 February 2016 10:59:31 Andrew Morton wrote:
> >> My version produces shortest code, Arnd's is the same as the old one.
> >> On the other side Rasmus proposition seems to be the most straightforward
> >> to me. Anyway I am not sure if the code length is the most important here.
> >>
> >> By the way .data segment size grows almost 4 times between gcc 4.4 and
> >> 4.8 :)
> >> Also numbers for arm64 looks interesting.
> >>
> >> Just for the record below all proposed implementations:
> >> #define IS_ERR_VALUE_old(x) unlikely((x) >= (unsigned long)-MAX_ERRNO)
> >> #define IS_ERR_VALUE_andrzej(x) ((typeof(x))(-1) <= 0 \
> >> ? unlikely((x) <= -1) \
> >> : unlikely((x) >= (typeof(x))-MAX_ERRNO))
> >> #define IS_ERR_VALUE_arnd(x) (unlikely((unsigned long long)(x) >=
> >> (unsigned long long)(typeof(x))-MAX_ERRNO))
> >> #define IS_ERR_VALUE_rasmus(x) ({\
> >> typeof(x) _x = (x);\
> >> unlikely(_x >= (typeof(x))-MAX_ERRNO && _x <= (typeof(x))-1);\
> >> })
> >>
> >>> Andrzej's version is a little shorter on ARM because in case of signed numbers
> >>> it only checks for negative values, rather than checking for values in the
> >>> [-MAX_ERRNO..-1] range. I think the original behavior is more logical
> >>> in this case, and my version restores it.
> >> As I looked at the usage of the macro in the kernel I have not found any
> >> code
> >> which could benefit from the original behavior, except some buggy code in
> >> staging which have already pending fix[1].
> >> But maybe it would be better to use IS_ERR_VALUE to always check if err
> >> is in
> >> range [-MAX_ERRNO..-1] and just use simple 'err < 0' in typical case of
> >> signed types.
> > If we do that, should we also make it illegal to use an invalid type
> > for IS_ERR()? At least that could also catch any use of 'char' and 'unsigned
> > char' that are still broken.
> I meant rather to make such 'policy' for future code by adding some
> comment to the macro. Optionally adding compile time warning
> to encourage developers to change current usage, however I am
> not sure if it is not too harsh.
> This way it could be also good to use your version of the macro.
> It could be also good to add compiletime_assert to prevent char types
> as suggested by Rasmus.
>
> Finally it could look like:
> /*
> * Use IS_ERR_VALUE only on unsigned types of at least two bytes size.
> * For signed types use '< 0' comparison.
> */
> #define IS_ERR_VALUE(x)\
> ({\
> compiletime_assert(sizeof(x) > 1, "IS_ERR_VALUE does not handle
> byte-size types");\
> compiletime_assert_warning((typeof(x))(-1) > 0, "IS_ERR_VALUE
> should be called on unsigned types only, use '< 0' instead");\
> (unlikely((unsigned long long)(x) >= (unsigned long
> long)(typeof(x))-MAX_ERRNO));\
> })
>
I think the easiest way to express this would be to ensure that the argument
is 'unsigned long', like:
#define IS_ERR_VALUE(x) ((unsigned long*)NULL == (typeof (x)*)NULL && \
unlikely((unsigned long long)(x) >= (unsigned long long)(typeof(x))-MAX_ERRNO))
I tried to figure out where that would take as, as we then have to change
all users of IS_ERR_VALUE() that don't use an 'unsigned long' argument, not
just the ones that use one of the forbidden types (long long, unsigned long long,
unsigned int, unsigned short, char, unsigned char, signed char).
The patch below modifies all drivers that see newly introduced warnings with
the version above. Most of them pass an 'int' into IS_ERR_VALUE(), which currently
works as expected.
There are probably a couple of other architecture-specific files using IS_ERR_VALUE()
that I did not catch with ARM allmodocnfig and randconfig builds.
Arnd
drivers/ata/sata_highbank.c | 2 +-
drivers/char/mem.c | 2 +-
drivers/cpufreq/omap-cpufreq.c | 2 +-
drivers/crypto/caam/ctrl.c | 2 +-
drivers/dma/sun4i-dma.c | 16 ++++++++--------
drivers/gpu/drm/sti/sti_vtg.c | 4 ++--
drivers/gpu/drm/tilcdc/tilcdc_tfp410.c | 2 +-
drivers/gpu/host1x/hw/intr_hw.c | 2 +-
drivers/iommu/arm-smmu.c | 8 ++++----
drivers/irqchip/irq-clps711x.c | 2 +-
drivers/irqchip/irq-gic.c | 2 +-
drivers/irqchip/irq-hip04.c | 2 +-
drivers/media/i2c/adp1653.c | 10 +++++-----
drivers/media/platform/s5p-tv/mixer_drv.c | 2 +-
drivers/media/platform/soc_camera/atmel-isi.c | 2 +-
drivers/mfd/twl4030-irq.c | 2 +-
drivers/mmc/core/mmc.c | 4 ++--
drivers/mmc/host/dw_mmc.c | 6 +++---
drivers/mmc/host/sdhci-esdhc-imx.c | 2 +-
drivers/mmc/host/sdhci.c | 4 ++--
drivers/net/ethernet/freescale/fman/fman.c | 2 +-
drivers/net/ethernet/freescale/fman/fman_muram.c | 4 ++--
drivers/net/ethernet/freescale/fman/fman_muram.h | 4 ++--
drivers/net/wireless/ti/wlcore/spi.c | 4 ++--
drivers/nvmem/core.c | 22 +++++++++++-----------
drivers/staging/lustre/lnet/lnet/acceptor.c | 4 ++--
drivers/staging/lustre/lnet/lnet/router.c | 4 ++--
drivers/staging/lustre/lustre/llite/statahead.c | 4 ++--
drivers/staging/lustre/lustre/mdc/mdc_request.c | 4 ++--
drivers/staging/lustre/lustre/mgc/mgc_request.c | 4 ++--
drivers/staging/lustre/lustre/obdclass/llog.c | 4 ++--
drivers/staging/lustre/lustre/ptlrpc/pinger.c | 4 ++--
drivers/staging/lustre/lustre/ptlrpc/service.c | 10 +++++-----
drivers/tty/serial/amba-pl011.c | 2 +-
drivers/tty/serial/clps711x.c | 4 ++--
drivers/tty/serial/digicolor-usart.c | 2 +-
drivers/video/fbdev/da8xx-fb.c | 4 ++--
drivers/video/fbdev/exynos/exynos_mipi_dsi.c | 2 +-
fs/afs/write.c | 4 ----
fs/gfs2/dir.c | 4 ++--
include/linux/err.h | 3 ++-
kernel/pid.c | 2 +-
net/9p/client.c | 4 ++--
net/ipv4/netfilter/arp_tables.c | 2 +-
net/ipv4/netfilter/ip_tables.c | 2 +-
net/ipv6/netfilter/ip6_tables.c | 2 +-
sound/soc/qcom/lpass-platform.c | 2 +-
47 files changed, 94 insertions(+), 97 deletions(-)
diff --git a/drivers/ata/sata_highbank.c b/drivers/ata/sata_highbank.c
index 8638d575b2b9..aafb8cc03523 100644
--- a/drivers/ata/sata_highbank.c
+++ b/drivers/ata/sata_highbank.c
@@ -197,7 +197,7 @@ static void highbank_set_em_messages(struct device *dev,
for (i = 0; i < SGPIO_PINS; i++) {
err = of_get_named_gpio(np, "calxeda,sgpio-gpio", i);
- if (IS_ERR_VALUE(err))
+ if (err < 0)
return;
pdata->sgpio_gpio[i] = err;
diff --git a/drivers/char/mem.c b/drivers/char/mem.c
index 4f6f94c43412..3ffd3e32051b 100644
--- a/drivers/char/mem.c
+++ b/drivers/char/mem.c
@@ -695,7 +695,7 @@ static loff_t memory_lseek(struct file *file, loff_t offset, int orig)
offset += file->f_pos;
case SEEK_SET:
/* to avoid userland mistaking f_pos=-9 as -EBADF=-9 */
- if (IS_ERR_VALUE((unsigned long long)offset)) {
+ if (offset > (unsigned long long)-MAX_ERRNO) {
ret = -EOVERFLOW;
break;
}
diff --git a/drivers/cpufreq/omap-cpufreq.c b/drivers/cpufreq/omap-cpufreq.c
index e3866e0d5bf8..c182c8c84b8d 100644
--- a/drivers/cpufreq/omap-cpufreq.c
+++ b/drivers/cpufreq/omap-cpufreq.c
@@ -51,7 +51,7 @@ static int omap_target(struct cpufreq_policy *policy, unsigned int index)
freq = new_freq * 1000;
ret = clk_round_rate(policy->clk, freq);
- if (IS_ERR_VALUE(ret)) {
+ if (ret < 0) {
dev_warn(mpu_dev,
"CPUfreq: Cannot find matching frequency for %lu\n",
freq);
diff --git a/drivers/crypto/caam/ctrl.c b/drivers/crypto/caam/ctrl.c
index 44d30b45f3cc..5ad5f3009ae0 100644
--- a/drivers/crypto/caam/ctrl.c
+++ b/drivers/crypto/caam/ctrl.c
@@ -402,7 +402,7 @@ int caam_get_era(void)
ret = of_property_read_u32(caam_node, "fsl,sec-era", &prop);
of_node_put(caam_node);
- return IS_ERR_VALUE(ret) ? -ENOTSUPP : prop;
+ return ret ? -ENOTSUPP : prop;
}
EXPORT_SYMBOL(caam_get_era);
diff --git a/drivers/dma/sun4i-dma.c b/drivers/dma/sun4i-dma.c
index 1661d518224a..4dc7a686af1c 100644
--- a/drivers/dma/sun4i-dma.c
+++ b/drivers/dma/sun4i-dma.c
@@ -461,25 +461,25 @@ generate_ndma_promise(struct dma_chan *chan, dma_addr_t src, dma_addr_t dest,
/* Source burst */
ret = convert_burst(sconfig->src_maxburst);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_SRC_BURST_LENGTH(ret);
/* Destination burst */
ret = convert_burst(sconfig->dst_maxburst);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_DST_BURST_LENGTH(ret);
/* Source bus width */
ret = convert_buswidth(sconfig->src_addr_width);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_SRC_DATA_WIDTH(ret);
/* Destination bus width */
ret = convert_buswidth(sconfig->dst_addr_width);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_DST_DATA_WIDTH(ret);
@@ -518,25 +518,25 @@ generate_ddma_promise(struct dma_chan *chan, dma_addr_t src, dma_addr_t dest,
/* Source burst */
ret = convert_burst(sconfig->src_maxburst);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_SRC_BURST_LENGTH(ret);
/* Destination burst */
ret = convert_burst(sconfig->dst_maxburst);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_DST_BURST_LENGTH(ret);
/* Source bus width */
ret = convert_buswidth(sconfig->src_addr_width);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_SRC_DATA_WIDTH(ret);
/* Destination bus width */
ret = convert_buswidth(sconfig->dst_addr_width);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto fail;
promise->cfg |= SUN4I_DMA_CFG_DST_DATA_WIDTH(ret);
diff --git a/drivers/gpu/drm/sti/sti_vtg.c b/drivers/gpu/drm/sti/sti_vtg.c
index d56630c60039..71c03ea20e32 100644
--- a/drivers/gpu/drm/sti/sti_vtg.c
+++ b/drivers/gpu/drm/sti/sti_vtg.c
@@ -355,7 +355,7 @@ static int vtg_probe(struct platform_device *pdev)
return -EPROBE_DEFER;
} else {
vtg->irq = platform_get_irq(pdev, 0);
- if (IS_ERR_VALUE(vtg->irq)) {
+ if (vtg->irq < 0) {
DRM_ERROR("Failed to get VTG interrupt\n");
return vtg->irq;
}
@@ -365,7 +365,7 @@ static int vtg_probe(struct platform_device *pdev)
ret = devm_request_threaded_irq(dev, vtg->irq, vtg_irq,
vtg_irq_thread, IRQF_ONESHOT,
dev_name(dev), vtg);
- if (IS_ERR_VALUE(ret)) {
+ if (ret < 0) {
DRM_ERROR("Failed to register VTG interrupt\n");
return ret;
}
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
index 5052a8af7ecb..7e4f56254af7 100644
--- a/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
+++ b/drivers/gpu/drm/tilcdc/tilcdc_tfp410.c
@@ -359,7 +359,7 @@ static int tfp410_probe(struct platform_device *pdev)
tfp410_mod->gpio = of_get_named_gpio_flags(node, "powerdn-gpio",
0, NULL);
- if (IS_ERR_VALUE(tfp410_mod->gpio)) {
+ if (tfp410_mod->gpio < 0) {
dev_warn(&pdev->dev, "No power down GPIO\n");
} else {
ret = gpio_request(tfp410_mod->gpio, "DVI_PDn");
diff --git a/drivers/gpu/host1x/hw/intr_hw.c b/drivers/gpu/host1x/hw/intr_hw.c
index 498b37e39058..e1e31e9e67cd 100644
--- a/drivers/gpu/host1x/hw/intr_hw.c
+++ b/drivers/gpu/host1x/hw/intr_hw.c
@@ -85,7 +85,7 @@ static int _host1x_intr_init_host_sync(struct host1x *host, u32 cpm,
err = devm_request_irq(host->dev, host->intr_syncpt_irq,
syncpt_thresh_isr, IRQF_SHARED,
"host1x_syncpt", host);
- if (IS_ERR_VALUE(err)) {
+ if (err < 0) {
WARN_ON(1);
return err;
}
diff --git a/drivers/iommu/arm-smmu.c b/drivers/iommu/arm-smmu.c
index 59ee4b8a3236..f6750772f6d8 100644
--- a/drivers/iommu/arm-smmu.c
+++ b/drivers/iommu/arm-smmu.c
@@ -874,7 +874,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
ret = __arm_smmu_alloc_bitmap(smmu->context_map, start,
smmu->num_context_banks);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
goto out_unlock;
cfg->cbndx = ret;
@@ -913,7 +913,7 @@ static int arm_smmu_init_domain_context(struct iommu_domain *domain,
irq = smmu->irqs[smmu->num_global_irqs + cfg->irptndx];
ret = request_irq(irq, arm_smmu_context_fault, IRQF_SHARED,
"arm-smmu-context-fault", domain);
- if (IS_ERR_VALUE(ret)) {
+ if (ret < 0) {
dev_err(smmu->dev, "failed to request context IRQ %d (%u)\n",
cfg->irptndx, irq);
cfg->irptndx = INVALID_IRPTNDX;
@@ -1016,7 +1016,7 @@ static int arm_smmu_master_configure_smrs(struct arm_smmu_device *smmu,
for (i = 0; i < cfg->num_streamids; ++i) {
int idx = __arm_smmu_alloc_bitmap(smmu->smr_map, 0,
smmu->num_mapping_groups);
- if (IS_ERR_VALUE(idx)) {
+ if (idx < 0) {
dev_err(smmu->dev, "failed to allocate free SMR\n");
goto err_free_smrs;
}
@@ -1136,7 +1136,7 @@ static int arm_smmu_attach_dev(struct iommu_domain *domain, struct device *dev)
/* Ensure that the domain is finalised */
ret = arm_smmu_init_domain_context(domain, smmu);
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
/*
diff --git a/drivers/irqchip/irq-clps711x.c b/drivers/irqchip/irq-clps711x.c
index eb5eb0cd414d..2223b3f15d68 100644
--- a/drivers/irqchip/irq-clps711x.c
+++ b/drivers/irqchip/irq-clps711x.c
@@ -182,7 +182,7 @@ static int __init _clps711x_intc_init(struct device_node *np,
writel_relaxed(0, clps711x_intc->intmr[2]);
err = irq_alloc_descs(-1, 0, ARRAY_SIZE(clps711x_irqs), numa_node_id());
- if (IS_ERR_VALUE(err))
+ if (err < 0)
goto out_iounmap;
clps711x_intc->ops.map = clps711x_intc_irq_map;
diff --git a/drivers/irqchip/irq-gic.c b/drivers/irqchip/irq-gic.c
index 911758c056c1..355d0779bec0 100644
--- a/drivers/irqchip/irq-gic.c
+++ b/drivers/irqchip/irq-gic.c
@@ -1103,7 +1103,7 @@ static void __init __gic_init_bases(unsigned int gic_nr, int irq_start,
irq_base = irq_alloc_descs(irq_start, 16, gic_irqs,
numa_node_id());
- if (IS_ERR_VALUE(irq_base)) {
+ if (irq_base < 0) {
WARN(1, "Cannot allocate irq_descs @ IRQ%d, assuming pre-allocated\n",
irq_start);
irq_base = irq_start;
diff --git a/drivers/irqchip/irq-hip04.c b/drivers/irqchip/irq-hip04.c
index 9688d2e2a636..9e25d8ce08e5 100644
--- a/drivers/irqchip/irq-hip04.c
+++ b/drivers/irqchip/irq-hip04.c
@@ -402,7 +402,7 @@ hip04_of_init(struct device_node *node, struct device_node *parent)
nr_irqs -= hwirq_base; /* calculate # of irqs to allocate */
irq_base = irq_alloc_descs(-1, hwirq_base, nr_irqs, numa_node_id());
- if (IS_ERR_VALUE(irq_base)) {
+ if (irq_base < 0) {
pr_err("failed to allocate IRQ numbers\n");
return -EINVAL;
}
diff --git a/drivers/media/i2c/adp1653.c b/drivers/media/i2c/adp1653.c
index 7e9cbf757e95..efa1c11f8f0b 100644
--- a/drivers/media/i2c/adp1653.c
+++ b/drivers/media/i2c/adp1653.c
@@ -95,7 +95,7 @@ static int adp1653_get_fault(struct adp1653_flash *flash)
int rval;
fault = i2c_smbus_read_byte_data(client, ADP1653_REG_FAULT);
- if (IS_ERR_VALUE(fault))
+ if (fault < 0)
return fault;
flash->fault |= fault;
@@ -105,13 +105,13 @@ static int adp1653_get_fault(struct adp1653_flash *flash)
/* Clear faults. */
rval = i2c_smbus_write_byte_data(client, ADP1653_REG_OUT_SEL, 0);
- if (IS_ERR_VALUE(rval))
+ if (rval < 0)
return rval;
flash->led_mode->val = V4L2_FLASH_LED_MODE_NONE;
rval = adp1653_update_hw(flash);
- if (IS_ERR_VALUE(rval))
+ if (rval)
return rval;
return flash->fault;
@@ -158,7 +158,7 @@ static int adp1653_get_ctrl(struct v4l2_ctrl *ctrl)
int rval;
rval = adp1653_get_fault(flash);
- if (IS_ERR_VALUE(rval))
+ if (rval)
return rval;
ctrl->cur.val = 0;
@@ -184,7 +184,7 @@ static int adp1653_set_ctrl(struct v4l2_ctrl *ctrl)
int rval;
rval = adp1653_get_fault(flash);
- if (IS_ERR_VALUE(rval))
+ if (rval)
return rval;
if ((rval & (ADP1653_REG_FAULT_FLT_SCP |
ADP1653_REG_FAULT_FLT_OT |
diff --git a/drivers/media/platform/s5p-tv/mixer_drv.c b/drivers/media/platform/s5p-tv/mixer_drv.c
index 5ef67774971d..8a5d19469ddc 100644
--- a/drivers/media/platform/s5p-tv/mixer_drv.c
+++ b/drivers/media/platform/s5p-tv/mixer_drv.c
@@ -146,7 +146,7 @@ int mxr_power_get(struct mxr_device *mdev)
/* returning 1 means that power is already enabled,
* so zero success be returned */
- if (IS_ERR_VALUE(ret))
+ if (ret < 0)
return ret;
return 0;
}
diff --git a/drivers/media/platform/soc_camera/atmel-isi.c b/drivers/media/platform/soc_camera/atmel-isi.c
index 1af779ee3c74..fbc8f633521e 100644
--- a/drivers/media/platform/soc_camera/atmel-isi.c
+++ b/drivers/media/platform/soc_camera/atmel-isi.c
@@ -1086,7 +1086,7 @@ static int atmel_isi_probe(struct platform_device *pdev)
isi->width_flags |= 1 << 9;
irq = platform_get_irq(pdev, 0);
- if (IS_ERR_VALUE(irq)) {
+ if (irq < 0) {
ret = irq;
goto err_req_irq;
}
diff --git a/drivers/mfd/twl4030-irq.c b/drivers/mfd/twl4030-irq.c
index 40e51b0baa46..b46c0cfc27d9 100644
--- a/drivers/mfd/twl4030-irq.c
+++ b/drivers/mfd/twl4030-irq.c
@@ -696,7 +696,7 @@ int twl4030_init_irq(struct device *dev, int irq_num)
nr_irqs = TWL4030_PWR_NR_IRQS + TWL4030_CORE_NR_IRQS;
irq_base = irq_alloc_descs(-1, 0, nr_irqs, 0);
- if (IS_ERR_VALUE(irq_base)) {
+ if (irq_base < 0) {
dev_err(dev, "Fail to allocate IRQ descs\n");
return irq_base;
}
diff --git a/drivers/mmc/core/mmc.c b/drivers/mmc/core/mmc.c
index 4dbe3df8024b..6304883f35a2 100644
--- a/drivers/mmc/core/mmc.c
+++ b/drivers/mmc/core/mmc.c
@@ -1268,7 +1268,7 @@ static int mmc_select_hs200(struct mmc_card *card)
* switch to HS200 mode if bus width is set successfully.
*/
err = mmc_select_bus_width(card);
- if (!IS_ERR_VALUE(err)) {
+ if (!err) {
val = EXT_CSD_TIMING_HS200 |
card->drive_strength << EXT_CSD_DRV_STR_SHIFT;
err = __mmc_switch(card, EXT_CSD_CMD_SET_NORMAL,
@@ -1577,7 +1577,7 @@ static int mmc_init_card(struct mmc_host *host, u32 ocr,
} else if (mmc_card_hs(card)) {
/* Select the desired bus width optionally */
err = mmc_select_bus_width(card);
- if (!IS_ERR_VALUE(err)) {
+ if (!err) {
err = mmc_select_hs_ddr(card);
if (err)
goto free_card;
diff --git a/drivers/mmc/host/dw_mmc.c b/drivers/mmc/host/dw_mmc.c
index 242f9a0769bd..a4cbbfe1eabe 100644
--- a/drivers/mmc/host/dw_mmc.c
+++ b/drivers/mmc/host/dw_mmc.c
@@ -1431,7 +1431,7 @@ static int dw_mci_get_ro(struct mmc_host *mmc)
int gpio_ro = mmc_gpio_get_ro(mmc);
/* Use platform get_ro function, else try on board write protect */
- if (!IS_ERR_VALUE(gpio_ro))
+ if (gpio_ro >= 0)
read_only = gpio_ro;
else
read_only =
@@ -1454,7 +1454,7 @@ static int dw_mci_get_cd(struct mmc_host *mmc)
if ((mmc->caps & MMC_CAP_NEEDS_POLL) ||
(mmc->caps & MMC_CAP_NONREMOVABLE))
present = 1;
- else if (!IS_ERR_VALUE(gpio_cd))
+ else if (gpio_cd >= 0)
present = gpio_cd;
else
present = (mci_readl(slot->host, CDETECT) & (1 << slot->id))
@@ -2927,7 +2927,7 @@ static void dw_mci_enable_cd(struct dw_mci *host)
if (slot->mmc->caps & MMC_CAP_NEEDS_POLL)
return;
- if (IS_ERR_VALUE(mmc_gpio_get_cd(slot->mmc)))
+ if (mmc_gpio_get_cd(slot->mmc) < 0)
break;
}
if (i == host->num_slots)
diff --git a/drivers/mmc/host/sdhci-esdhc-imx.c b/drivers/mmc/host/sdhci-esdhc-imx.c
index f25f29253595..22e47ab06e9f 100644
--- a/drivers/mmc/host/sdhci-esdhc-imx.c
+++ b/drivers/mmc/host/sdhci-esdhc-imx.c
@@ -1011,7 +1011,7 @@ sdhci_esdhc_imx_probe_dt(struct platform_device *pdev,
if (ret)
return ret;
- if (!IS_ERR_VALUE(mmc_gpio_get_cd(host->mmc)))
+ if (mmc_gpio_get_cd(host->mmc) >= 0)
host->quirks &= ~SDHCI_QUIRK_BROKEN_CARD_DETECTION;
return 0;
diff --git a/drivers/mmc/host/sdhci.c b/drivers/mmc/host/sdhci.c
index d622435d1bcc..8f1dca39a940 100644
--- a/drivers/mmc/host/sdhci.c
+++ b/drivers/mmc/host/sdhci.c
@@ -1625,7 +1625,7 @@ static int sdhci_do_get_cd(struct sdhci_host *host)
* Try slot gpio detect, if defined it take precedence
* over build in controller functionality
*/
- if (!IS_ERR_VALUE(gpio_cd))
+ if (gpio_cd >= 0)
return !!gpio_cd;
/* If polling, assume that the card is always present. */
@@ -3114,7 +3114,7 @@ int sdhci_add_host(struct sdhci_host *host)
if ((host->quirks & SDHCI_QUIRK_BROKEN_CARD_DETECTION) &&
!(mmc->caps & MMC_CAP_NONREMOVABLE) &&
- IS_ERR_VALUE(mmc_gpio_get_cd(host->mmc)))
+ mmc_gpio_get_cd(host->mmc) < 0)
mmc->caps |= MMC_CAP_NEEDS_POLL;
/* If there are external regulators, get them */
diff --git a/drivers/net/ethernet/freescale/fman/fman.c b/drivers/net/ethernet/freescale/fman/fman.c
index 623aa1c8ebc6..f1a5f2a805ec 100644
--- a/drivers/net/ethernet/freescale/fman/fman.c
+++ b/drivers/net/ethernet/freescale/fman/fman.c
@@ -614,7 +614,7 @@ struct fman {
struct fman_cfg *cfg;
struct muram_info *muram;
/* cam section in muram */
- int cam_offset;
+ unsigned long cam_offset;
size_t cam_size;
/* Fifo in MURAM */
int fifo_offset;
diff --git a/drivers/net/ethernet/freescale/fman/fman_muram.c b/drivers/net/ethernet/freescale/fman/fman_muram.c
index 4eb0e9ac7182..47394c45b6e8 100644
--- a/drivers/net/ethernet/freescale/fman/fman_muram.c
+++ b/drivers/net/ethernet/freescale/fman/fman_muram.c
@@ -129,7 +129,7 @@ unsigned long fman_muram_offset_to_vbase(struct muram_info *muram,
*
* Return: address of the allocated memory; NULL otherwise.
*/
-int fman_muram_alloc(struct muram_info *muram, size_t size)
+unsigned long fman_muram_alloc(struct muram_info *muram, size_t size)
{
unsigned long vaddr;
@@ -150,7 +150,7 @@ int fman_muram_alloc(struct muram_info *muram, size_t size)
*
* Free an allocated memory from FM-MURAM partition.
*/
-void fman_muram_free_mem(struct muram_info *muram, u32 offset, size_t size)
+void fman_muram_free_mem(struct muram_info *muram, unsigned long offset, size_t size)
{
unsigned long addr = fman_muram_offset_to_vbase(muram, offset);
diff --git a/drivers/net/ethernet/freescale/fman/fman_muram.h b/drivers/net/ethernet/freescale/fman/fman_muram.h
index dbf0af9e5bb5..889649ad8931 100644
--- a/drivers/net/ethernet/freescale/fman/fman_muram.h
+++ b/drivers/net/ethernet/freescale/fman/fman_muram.h
@@ -44,8 +44,8 @@ struct muram_info *fman_muram_init(phys_addr_t base, size_t size);
unsigned long fman_muram_offset_to_vbase(struct muram_info *muram,
unsigned long offset);
-int fman_muram_alloc(struct muram_info *muram, size_t size);
+unsigned long fman_muram_alloc(struct muram_info *muram, size_t size);
-void fman_muram_free_mem(struct muram_info *muram, u32 offset, size_t size);
+void fman_muram_free_mem(struct muram_info *muram, unsigned long offset, size_t size);
#endif /* __FM_MURAM_EXT */
diff --git a/drivers/net/wireless/ti/wlcore/spi.c b/drivers/net/wireless/ti/wlcore/spi.c
index 020ac1a4b408..cea9443c22a6 100644
--- a/drivers/net/wireless/ti/wlcore/spi.c
+++ b/drivers/net/wireless/ti/wlcore/spi.c
@@ -382,7 +382,7 @@ static int wlcore_probe_of(struct spi_device *spi, struct wl12xx_spi_glue *glue,
ret = of_property_read_u32(dt_node, "ref-clock-frequency",
&pdev_data->ref_clock_freq);
- if (IS_ERR_VALUE(ret)) {
+ if (ret) {
dev_err(glue->dev,
"can't get reference clock frequency (%d)\n", ret);
return ret;
@@ -425,7 +425,7 @@ static int wl1271_probe(struct spi_device *spi)
}
ret = wlcore_probe_of(spi, glue, &pdev_data);
- if (IS_ERR_VALUE(ret)) {
+ if (ret) {
dev_err(glue->dev,
"can't get device tree parameters (%d)\n", ret);
return ret;
diff --git a/drivers/nvmem/core.c b/drivers/nvmem/core.c
index 9d11d9837312..69f2c6391ec5 100644
--- a/drivers/nvmem/core.c
+++ b/drivers/nvmem/core.c
@@ -80,7 +80,7 @@ static ssize_t bin_attr_nvmem_read(struct file *filp, struct kobject *kobj,
rc = regmap_raw_read(nvmem->regmap, pos, buf, count);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return count;
@@ -108,7 +108,7 @@ static ssize_t bin_attr_nvmem_write(struct file *filp, struct kobject *kobj,
rc = regmap_raw_write(nvmem->regmap, pos, buf, count);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return count;
@@ -280,7 +280,7 @@ static int nvmem_add_cells(struct nvmem_device *nvmem,
}
rval = nvmem_cell_info_to_nvmem_cell(nvmem, &info[i], cells[i]);
- if (IS_ERR_VALUE(rval)) {
+ if (rval) {
kfree(cells[i]);
goto err;
}
@@ -827,7 +827,7 @@ static int __nvmem_cell_read(struct nvmem_device *nvmem,
rc = regmap_raw_read(nvmem->regmap, cell->offset, buf, cell->bytes);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
/* shift bits in-place */
@@ -862,7 +862,7 @@ void *nvmem_cell_read(struct nvmem_cell *cell, size_t *len)
return ERR_PTR(-ENOMEM);
rc = __nvmem_cell_read(nvmem, cell, buf, len);
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
kfree(buf);
return ERR_PTR(rc);
}
@@ -947,7 +947,7 @@ int nvmem_cell_write(struct nvmem_cell *cell, void *buf, size_t len)
if (cell->bit_offset || cell->nbits)
kfree(buf);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return len;
@@ -975,11 +975,11 @@ ssize_t nvmem_device_cell_read(struct nvmem_device *nvmem,
return -EINVAL;
rc = nvmem_cell_info_to_nvmem_cell(nvmem, info, &cell);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
rc = __nvmem_cell_read(nvmem, &cell, buf, &len);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return len;
@@ -1005,7 +1005,7 @@ int nvmem_device_cell_write(struct nvmem_device *nvmem,
return -EINVAL;
rc = nvmem_cell_info_to_nvmem_cell(nvmem, info, &cell);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return nvmem_cell_write(&cell, buf, cell.bytes);
@@ -1034,7 +1034,7 @@ int nvmem_device_read(struct nvmem_device *nvmem,
rc = regmap_raw_read(nvmem->regmap, offset, buf, bytes);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
return bytes;
@@ -1062,7 +1062,7 @@ int nvmem_device_write(struct nvmem_device *nvmem,
rc = regmap_raw_write(nvmem->regmap, offset, buf, bytes);
- if (IS_ERR_VALUE(rc))
+ if (rc)
return rc;
diff --git a/drivers/staging/lustre/lnet/lnet/acceptor.c b/drivers/staging/lustre/lnet/lnet/acceptor.c
index fed57d90028d..78c3a5323295 100644
--- a/drivers/staging/lustre/lnet/lnet/acceptor.c
+++ b/drivers/staging/lustre/lnet/lnet/acceptor.c
@@ -454,10 +454,10 @@ lnet_acceptor_start(void)
if (lnet_count_acceptor_nis() == 0) /* not required */
return 0;
- rc2 = PTR_ERR(kthread_run(lnet_acceptor,
+ rc2 = PTR_ERR_OR_ZERO(kthread_run(lnet_acceptor,
(void *)(ulong_ptr_t)secure,
"acceptor_%03ld", secure));
- if (IS_ERR_VALUE(rc2)) {
+ if (rc2) {
CERROR("Can't start acceptor thread: %ld\n", rc2);
return -ESRCH;
diff --git a/drivers/staging/lustre/lnet/lnet/router.c b/drivers/staging/lustre/lnet/lnet/router.c
index f5faa414d250..2a8a684c5fb8 100644
--- a/drivers/staging/lustre/lnet/lnet/router.c
+++ b/drivers/staging/lustre/lnet/lnet/router.c
@@ -1029,9 +1029,9 @@ lnet_router_checker_start(void)
}
the_lnet.ln_rc_state = LNET_RC_STATE_RUNNING;
- rc = PTR_ERR(kthread_run(lnet_router_checker,
+ rc = PTR_ERR_OR_ZERO(kthread_run(lnet_router_checker,
NULL, "router_checker"));
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
CERROR("Can't start router checker thread: %d\n", rc);
/* block until event callback signals exit */
down(&the_lnet.ln_rc_signal);
diff --git a/drivers/staging/lustre/lustre/llite/statahead.c b/drivers/staging/lustre/lustre/llite/statahead.c
index 88ffd8e3abdb..e69b45f13799 100644
--- a/drivers/staging/lustre/lustre/llite/statahead.c
+++ b/drivers/staging/lustre/lustre/llite/statahead.c
@@ -1656,10 +1656,10 @@ int do_statahead_enter(struct inode *dir, struct dentry **dentryp,
lli->lli_sai = sai;
plli = ll_i2info(d_inode(parent));
- rc = PTR_ERR(kthread_run(ll_statahead_thread, parent,
+ rc = PTR_ERR_OR_ZERO(kthread_run(ll_statahead_thread, parent,
"ll_sa_%u", plli->lli_opendir_pid));
thread = &sai->sai_thread;
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
CERROR("can't start ll_sa thread, rc: %d\n", rc);
dput(parent);
lli->lli_opendir_key = NULL;
diff --git a/drivers/staging/lustre/lustre/mdc/mdc_request.c b/drivers/staging/lustre/lustre/mdc/mdc_request.c
index 43481278096f..7b1445c6ea5f 100644
--- a/drivers/staging/lustre/lustre/mdc/mdc_request.c
+++ b/drivers/staging/lustre/lustre/mdc/mdc_request.c
@@ -1571,9 +1571,9 @@ static int mdc_ioc_changelog_send(struct obd_device *obd,
* New thread because we should return to user app before
* writing into our pipe
*/
- rc = PTR_ERR(kthread_run(mdc_changelog_send_thread, cs,
+ rc = PTR_ERR_OR_ZERO(kthread_run(mdc_changelog_send_thread, cs,
"mdc_clg_send_thread"));
- if (!IS_ERR_VALUE(rc)) {
+ if (!rc) {
CDEBUG(D_CHANGELOG, "start changelog thread\n");
return 0;
}
diff --git a/drivers/staging/lustre/lustre/mgc/mgc_request.c b/drivers/staging/lustre/lustre/mgc/mgc_request.c
index ab4800c20a95..815b33c8fd97 100644
--- a/drivers/staging/lustre/lustre/mgc/mgc_request.c
+++ b/drivers/staging/lustre/lustre/mgc/mgc_request.c
@@ -734,9 +734,9 @@ static int mgc_setup(struct obd_device *obd, struct lustre_cfg *lcfg)
init_waitqueue_head(&rq_waitq);
/* start requeue thread */
- rc = PTR_ERR(kthread_run(mgc_requeue_thread, NULL,
+ rc = PTR_ERR_OR_ZERO(kthread_run(mgc_requeue_thread, NULL,
"ll_cfg_requeue"));
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
CERROR("%s: Cannot start requeue thread (%d),no more log updates!\n",
obd->obd_name, rc);
goto err_cleanup;
diff --git a/drivers/staging/lustre/lustre/obdclass/llog.c b/drivers/staging/lustre/lustre/obdclass/llog.c
index f956d7ed6785..91230c84ad6d 100644
--- a/drivers/staging/lustre/lustre/obdclass/llog.c
+++ b/drivers/staging/lustre/lustre/obdclass/llog.c
@@ -380,9 +380,9 @@ int llog_process_or_fork(const struct lu_env *env,
* init the new one in llog_process_thread_daemonize. */
lpi->lpi_env = NULL;
init_completion(&lpi->lpi_completion);
- rc = PTR_ERR(kthread_run(llog_process_thread_daemonize, lpi,
+ rc = PTR_ERR_OR_ZERO(kthread_run(llog_process_thread_daemonize, lpi,
"llog_process_thread"));
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
CERROR("%s: cannot start thread: rc = %d\n",
loghandle->lgh_ctxt->loc_obd->obd_name, rc);
kfree(lpi);
diff --git a/drivers/staging/lustre/lustre/ptlrpc/pinger.c b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
index fb2d5236a971..5b7743b9f48f 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/pinger.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/pinger.c
@@ -303,9 +303,9 @@ int ptlrpc_start_pinger(void)
strcpy(pinger_thread.t_name, "ll_ping");
- rc = PTR_ERR(kthread_run(ptlrpc_pinger_main, &pinger_thread,
+ rc = PTR_ERR_OR_ZERO(kthread_run(ptlrpc_pinger_main, &pinger_thread,
"%s", pinger_thread.t_name));
- if (IS_ERR_VALUE(rc)) {
+ if (rc) {
CERROR("cannot start thread: %d\n", rc);
return rc;
}
diff --git a/drivers/staging/lustre/lustre/ptlrpc/service.c b/drivers/staging/lustre/lustre/ptlrpc/service.c
index 8598300a61d1..8ca33f9dbf42 100644
--- a/drivers/staging/lustre/lustre/ptlrpc/service.c
+++ b/drivers/staging/lustre/lustre/ptlrpc/service.c
@@ -2256,17 +2256,17 @@ static int ptlrpc_start_hr_threads(void)
for (j = 0; j < hrp->hrp_nthrs; j++) {
struct ptlrpc_hr_thread *hrt = &hrp->hrp_thrs[j];
- rc = PTR_ERR(kthread_run(ptlrpc_hr_main,
+ rc = PTR_ERR_OR_ZERO(kthread_run(ptlrpc_hr_main,
&hrp->hrp_thrs[j],
"ptlrpc_hr%02d_%03d",
hrp->hrp_cpt,
hrt->hrt_id));
- if (IS_ERR_VALUE(rc))
+ if (rc)
break;
}
wait_event(ptlrpc_hr.hr_waitq,
atomic_read(&hrp->hrp_nstarted) == j);
- if (!IS_ERR_VALUE(rc))
+ if (!rc)
continue;
CERROR("Reply handling thread %d:%d Failed on starting: rc = %d\n",
@@ -2442,8 +2442,8 @@ int ptlrpc_start_thread(struct ptlrpc_service_part *svcpt, int wait)
}
CDEBUG(D_RPCTRACE, "starting thread '%s'\n", thread->t_name);
- rc = PTR_ERR(kthread_run(ptlrpc_main, thread, "%s", thread->t_name));
- if (IS_ERR_VALUE(rc)) {
+ rc = PTR_ERR_OR_ZERO(kthread_run(ptlrpc_main, thread, "%s", thread->t_name));
+ if (rc) {
CERROR("cannot start thread '%s': rc %d\n",
thread->t_name, rc);
spin_lock(&svcpt->scp_lock);
diff --git a/drivers/tty/serial/amba-pl011.c b/drivers/tty/serial/amba-pl011.c
index 500232ad38f3..e328df11b253 100644
--- a/drivers/tty/serial/amba-pl011.c
+++ b/drivers/tty/serial/amba-pl011.c
@@ -2357,7 +2357,7 @@ static int pl011_probe_dt_alias(int index, struct device *dev)
return ret;
ret = of_alias_get_id(np, "serial");
- if (IS_ERR_VALUE(ret)) {
+ if (ret < 0) {
seen_dev_without_alias = true;
ret = index;
} else {
diff --git a/drivers/tty/serial/clps711x.c b/drivers/tty/serial/clps711x.c
index b3a4e0cdddaa..fbb2b715afed 100644
--- a/drivers/tty/serial/clps711x.c
+++ b/drivers/tty/serial/clps711x.c
@@ -468,11 +468,11 @@ static int uart_clps711x_probe(struct platform_device *pdev)
return PTR_ERR(s->port.membase);
s->port.irq = platform_get_irq(pdev, 0);
- if (IS_ERR_VALUE(s->port.irq))
+ if (s->port.irq >= 0)
return s->port.irq;
s->rx_irq = platform_get_irq(pdev, 1);
- if (IS_ERR_VALUE(s->rx_irq))
+ if (s->rx_irq >= 0)
return s->rx_irq;
if (!np) {
diff --git a/drivers/tty/serial/digicolor-usart.c b/drivers/tty/serial/digicolor-usart.c
index a80cdad114f3..a576555de987 100644
--- a/drivers/tty/serial/digicolor-usart.c
+++ b/drivers/tty/serial/digicolor-usart.c
@@ -482,7 +482,7 @@ static int digicolor_uart_probe(struct platform_device *pdev)
return PTR_ERR(dp->port.membase);
dp->port.irq = platform_get_irq(pdev, 0);
- if (IS_ERR_VALUE(dp->port.irq))
+ if (dp->port.irq < 0)
return dp->port.irq;
dp->port.iotype = UPIO_MEM;
diff --git a/drivers/video/fbdev/da8xx-fb.c b/drivers/video/fbdev/da8xx-fb.c
index 6b2a06d09f2b..ec0573ff3b8c 100644
--- a/drivers/video/fbdev/da8xx-fb.c
+++ b/drivers/video/fbdev/da8xx-fb.c
@@ -714,7 +714,7 @@ static int da8xx_fb_config_clk_divider(struct da8xx_fb_par *par,
if (par->lcdc_clk_rate != lcdc_clk_rate) {
ret = clk_set_rate(par->lcdc_clk, lcdc_clk_rate);
- if (IS_ERR_VALUE(ret)) {
+ if (ret) {
dev_err(par->dev,
"unable to set clock rate at %u\n",
lcdc_clk_rate);
@@ -785,7 +785,7 @@ static int lcd_init(struct da8xx_fb_par *par, const struct lcd_ctrl_config *cfg,
int ret = 0;
ret = da8xx_fb_calc_config_clk_divider(par, panel);
- if (IS_ERR_VALUE(ret)) {
+ if (ret) {
dev_err(par->dev, "unable to configure clock\n");
return ret;
}
diff --git a/drivers/video/fbdev/exynos/exynos_mipi_dsi.c b/drivers/video/fbdev/exynos/exynos_mipi_dsi.c
index 18edc724bf57..8a30b653c9db 100644
--- a/drivers/video/fbdev/exynos/exynos_mipi_dsi.c
+++ b/drivers/video/fbdev/exynos/exynos_mipi_dsi.c
@@ -404,7 +404,7 @@ static int exynos_mipi_dsi_probe(struct platform_device *pdev)
}
dsim->irq = platform_get_irq(pdev, 0);
- if (IS_ERR_VALUE(dsim->irq)) {
+ if (dsim->irq < 0) {
dev_err(&pdev->dev, "failed to request dsim irq resource\n");
ret = -EINVAL;
goto error;
diff --git a/fs/afs/write.c b/fs/afs/write.c
index dfef94f70667..aa4adff3c0c2 100644
--- a/fs/afs/write.c
+++ b/fs/afs/write.c
@@ -643,10 +643,6 @@ ssize_t afs_file_write(struct kiocb *iocb, struct iov_iter *from)
return 0;
result = generic_file_write_iter(iocb, from);
- if (IS_ERR_VALUE(result)) {
- _leave(" = %zd", result);
- return result;
- }
_leave(" = %zd", result);
return result;
diff --git a/fs/gfs2/dir.c b/fs/gfs2/dir.c
index d4014af4f064..5c022acf116d 100644
--- a/fs/gfs2/dir.c
+++ b/fs/gfs2/dir.c
@@ -798,7 +798,7 @@ static int get_first_leaf(struct gfs2_inode *dip, u32 index,
int error;
error = get_leaf_nr(dip, index, &leaf_no);
- if (!IS_ERR_VALUE(error))
+ if (error)
error = get_leaf(dip, leaf_no, bh_out);
return error;
@@ -1014,7 +1014,7 @@ static int dir_split_leaf(struct inode *inode, const struct qstr *name)
index = name->hash >> (32 - dip->i_depth);
error = get_leaf_nr(dip, index, &leaf_no);
- if (IS_ERR_VALUE(error))
+ if (error)
return error;
/* Get the old leaf block */
diff --git a/include/linux/err.h b/include/linux/err.h
index 039b80bb56ae..141869e450a4 100644
--- a/include/linux/err.h
+++ b/include/linux/err.h
@@ -18,7 +18,8 @@
#ifndef __ASSEMBLY__
-#define IS_ERR_VALUE(x) (unlikely((unsigned long long)(x) >= (unsigned long long)(typeof(x))-MAX_ERRNO))
+#define IS_ERR_VALUE(x) ((unsigned long*)NULL == (typeof (x)*)NULL && \
+ unlikely((unsigned long long)(x) >= (unsigned long long)(typeof(x))-MAX_ERRNO))
static inline void * __must_check ERR_PTR(long error)
{
diff --git a/kernel/pid.c b/kernel/pid.c
index 4d73a834c7e6..f66162f2359b 100644
--- a/kernel/pid.c
+++ b/kernel/pid.c
@@ -311,7 +311,7 @@ struct pid *alloc_pid(struct pid_namespace *ns)
pid->level = ns->level;
for (i = ns->level; i >= 0; i--) {
nr = alloc_pidmap(tmp);
- if (IS_ERR_VALUE(nr)) {
+ if (nr < 0) {
retval = nr;
goto out_free;
}
diff --git a/net/9p/client.c b/net/9p/client.c
index ea79ee9a7348..7f6760ef7897 100644
--- a/net/9p/client.c
+++ b/net/9p/client.c
@@ -521,7 +521,7 @@ static int p9_check_errors(struct p9_client *c, struct p9_req_t *req)
if (p9_is_proto_dotu(c))
err = -ecode;
- if (!err || !IS_ERR_VALUE(err)) {
+ if (!err || !IS_ERR_VALUE((unsigned long)err)) {
err = p9_errstr2errno(ename, strlen(ename));
p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
@@ -608,7 +608,7 @@ static int p9_check_zc_errors(struct p9_client *c, struct p9_req_t *req,
if (p9_is_proto_dotu(c))
err = -ecode;
- if (!err || !IS_ERR_VALUE(err)) {
+ if (!err || !IS_ERR_VALUE((unsigned long)err)) {
err = p9_errstr2errno(ename, strlen(ename));
p9_debug(P9_DEBUG_9P, "<<< RERROR (%d) %s\n",
diff --git a/net/ipv4/netfilter/arp_tables.c b/net/ipv4/netfilter/arp_tables.c
index b488cac9c5ca..e64e850b8a9c 100644
--- a/net/ipv4/netfilter/arp_tables.c
+++ b/net/ipv4/netfilter/arp_tables.c
@@ -527,7 +527,7 @@ find_check_entry(struct arpt_entry *e, const char *name, unsigned int size)
return ret;
e->counters.pcnt = xt_percpu_counter_alloc();
- if (IS_ERR_VALUE(e->counters.pcnt))
+ if (IS_ERR_VALUE((unsigned long)e->counters.pcnt))
return -ENOMEM;
t = arpt_get_target(e);
diff --git a/net/ipv4/netfilter/ip_tables.c b/net/ipv4/netfilter/ip_tables.c
index b99affad6ba1..3e3c5fe35c83 100644
--- a/net/ipv4/netfilter/ip_tables.c
+++ b/net/ipv4/netfilter/ip_tables.c
@@ -671,7 +671,7 @@ find_check_entry(struct ipt_entry *e, struct net *net, const char *name,
return ret;
e->counters.pcnt = xt_percpu_counter_alloc();
- if (IS_ERR_VALUE(e->counters.pcnt))
+ if (IS_ERR_VALUE((unsigned long)e->counters.pcnt))
return -ENOMEM;
j = 0;
diff --git a/net/ipv6/netfilter/ip6_tables.c b/net/ipv6/netfilter/ip6_tables.c
index 99425cf2819b..287ad4126e24 100644
--- a/net/ipv6/netfilter/ip6_tables.c
+++ b/net/ipv6/netfilter/ip6_tables.c
@@ -684,7 +684,7 @@ find_check_entry(struct ip6t_entry *e, struct net *net, const char *name,
return ret;
e->counters.pcnt = xt_percpu_counter_alloc();
- if (IS_ERR_VALUE(e->counters.pcnt))
+ if (IS_ERR_VALUE((unsigned long)e->counters.pcnt))
return -ENOMEM;
j = 0;
diff --git a/sound/soc/qcom/lpass-platform.c b/sound/soc/qcom/lpass-platform.c
index 4aeb8e1a7160..6c8f084a7599 100644
--- a/sound/soc/qcom/lpass-platform.c
+++ b/sound/soc/qcom/lpass-platform.c
@@ -491,7 +491,7 @@ static int lpass_platform_pcm_new(struct snd_soc_pcm_runtime *soc_runtime)
if (v->alloc_dma_channel)
data->rdma_ch = v->alloc_dma_channel(drvdata);
- if (IS_ERR_VALUE(data->rdma_ch))
+ if (data->rdma_ch < 0)
return data->rdma_ch;
drvdata->substream[data->rdma_ch] = substream;
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